![sumacwatches](/img/default-banner.jpg)
- Видео 8
- Просмотров 30 527
sumacwatches
Добавлен 4 июл 2022
Fire damaged Seiko 7A28-7120 Gen 1 renovation
In this video, I take a fire-damaged Seiko Gen 1 and bring it back to life. The distressed cosmetic appearance is retained but the movement is stripped and serviced, with new crystal and gaskets to bring it back to full working order and to make it a useable watch once more. The video includes stills of the movement rebuild but is not a complete record and does not show lubrication and other elements of the servicing process. Everything was done in accordance with the Seiko Technical Guide.
Просмотров: 308
Видео
Rigging a 'Marine Nationale' elastic strap for fixed bars
Просмотров 4,2 тыс.Год назад
Most MN elastic straps on the market are designed for use with spring bars. Here is a quick and easy way to adapt these straps for use with fixed bars, like CWC divers and chronographs. Better off doing this with a cheap one and not a really expensive one. And do take care, the video involves knives and blowtorches so , safety first!
CWC diver: crystal replacement
Просмотров 1,7 тыс.Год назад
In this short video we cover removal and replacement of the crystal in a CWC diver. It covers all CWC divers - RN and SBS - and also applies to many other watches with a glass crystal.
CWC G10: stem and movement removal
Просмотров 1,7 тыс.Год назад
People often get a bit stuck when they have to remove the stem and crown from watches, and as this is necessary in order to get the movement out of the case, that can be a bit of a problem. In this video we look at how to extract the stem from a CWC G10, so that you can get the movement, dial and hands out. The same process works for CWC quartz divers as well.
CWC G10: case back removal
Просмотров 2 тыс.Год назад
Getting the back of a CWC G10 can be a bit tricky and it's all too easy to damage the case or case back in the process. In this video I demonstrate how to get the back off a G10 without causing any scrapes or scratches. I don't show you how to put it back on though! Will have to cover that in another video......
CWC/Hamilton W10 movement removal
Просмотров 3,6 тыс.Год назад
The CWC and Hamilton 'W10' watches are 'front-loaders' and removing the crown and crystal in order to access the movement can be a bit daunting. In this video I demonstrate how to remove the crystal and crown so that the movement can be extracted for inspection and maintenance. This video covers the basics and some of the risks, but does not cover all eventualities and you could still run into ...
CWC diver battery replacement
Просмотров 5 тыс.2 года назад
Replacing a battery in a CWC diver should be a simple, straightforward job, but which is the best battery to use? And exactly what is the process to get the job done? This short video will take you through the process step-by-step with a few tips and hints along the way.
Refitting the rotating bezel on a CWC divers watch
Просмотров 12 тыс.2 года назад
Refitting the bezel on these watches can be super-tricky. There's a knack to it. In this video I show how it's done.
Thank you for this video. However i dont seem to get it to work. My spring seem rather short and the bezel does not stay on for very long. Could i be missing something with my retaining spring? That its placed wrongly? Note that i have replaced the glas aswell. Best regards
Hi. The springs seem to be made to slightly different specs at different times - some are longer/shorter and some are slightly heavier/lighter gauge wire, so that shouldn't make too much difference. I would carefully check each straight section of the retaining wire and make sure it is flat. If there is an upwards bend then one of the flats may not be slipping over the flange when you fit it and when you turn the bezel is basically unzips and the bezel comes off. The other issue I have seen is that the flange on the bezel can be worn or damaged, and the affect is the same. As you turn the bezel the wire slips off at the point where the flange is worn and then the rest follows as you continue to turn the bezel. If that is the problem then the case would need to be repaired by someone who does micro-welding, or find a new case - they do come up from sale sometimes.
I just came across your tutorial. This is by far the best strap tutorial I have ever watched. Crazy good. Thanks mate.
Thanks mate! great to hear that - I will quote you on my Instagram!
Thank you for this.
You are very welcome.
I do have to say that’s a great idea thinking outside the box thank you for that idea👍
This is fantastic. Thank you. Just curious, should you know...would parts from a run-of-the-mill, non-hacking ETA2750 work as replacement parts in a CWC W10's ETA movement? Excepting the parts involved in hacking and the split-stem, naturally. I had my W10 expertly serviced in the UK early in 2020, then later in the year, it fell from my wrist while I was feeding my infant in the wee hours. Didn't fasten the strap appropriately, in my midnight stupor. A couple of local watchmakers couldn't get it quite right, so I'm hoping that someone more experienced can, if I provide them a spare movement for parts. I appreciate any information you can provide!
Hi, apart from the balance, hacking lever and split stem all parts are the same and compatible with non-hacking, non-military movements, although obviously the bridges have different finish and markings. I service these week in, week out and have a good stock of parts and many parts are still available from the watch materials houses as well. If you want to me to look at it for you, send me a private message via Instagram @sumacwatches. Cheers
Many thanks! Glad parts are still available or at least obtainable.
Can the crown gasket be replaced on these, was thinking of changing the gaskets but not sure if they are available.
Hi, yes the crown gasket can be replaced.
@@sumacwatches6149 thanks so much , do you know the size ?
@@MagWatchTime should be 4.50 x 3.00 x 0.75mm
So how did you get it off?
With difficulty. You either spend a fortune on a very expensive bezel removal tool, like the Bergeon one - the cheap versions on Amazon tend not to work, although some people have had success with them. Generally I carefully lever them off with a stanley knife blade tapped in between the bezel and case, protected with a bit of polythene. Start between the lugs at the 6 position and as the gap opens up, work your way around and after a while it pops off.
Ola. Tudo bem tenho tenho um relogio deste. e estou consertando ele. Preciso das medidas do insert ou bezel. E as medidas do vidro muito obrigado
The original crystal is 31 mm x 2.5mm. However, if you have to replace the gasket then you may need to adjust the crystal depending on the inner diameter of the gasket. Bezel insert dimensions are 37mm outer diameter and 32mm inner diameter as close as I can measure.
@@sumacwatches6149 muito obrigado tinha medido mais eu achei que tava errado vc me salvou
Ola vc tem as medidas deste insert obrigado
Great informative video, thank you for sharing your skills!
The more intriguing question is how to remove the bezel?
That could be a different video! There is a bezel removal tool which is a large set of pliers with nylon/composite inserts that is widely available, but unless you buy an absolutely top end one (Bergeon = £715 +VAT) then they are not much use against a CWC diver bezel. The most practical technique is to open up a gap by gently tapping in a thin knife blade between the case and the bezel and then widen/extend the gap with a case knife - taking extreme care not to damage the case. With lesser watches this approach could distort the bezel, which would then need to be straightened, but the Monnin-type bezel rings are pretty sturdy so this is a less of a risk. Once the gap is big enough the bezel will pop off. If you are working on an SBS then there is a risk of damaging the PVD coating, so I would say if you do not need to remove the bezel, leave it alone.
Great work! a tribute to the first Seiko quartz chronograph movement. These movements were made to be serviced/repaired, thick plates 8 jewels etc... I have the "civilian" version 7A28-7039 of this watch, bought new in the U.S. in 1984. It still keeps time but the chronograph functions are hit and miss, never serviced since 1984! because no one wants to work on it. I am in desperate need to find a watchmaker who wants to work on "inferiour quartz movements preferably on the continent (BeNeLux). Any ideas?
Thank you! I don't know anyone in your area I'm afraid. If you are prepared to navigate the import/export stuff you can always send it to me and I can fully strip, clean, service and regulate the watch for you.
@@JosFiner Thank you for your quick reply, I will contact my local customs office, to find out if they have a temporary export option, for repairs, so that you or I are not exposed to import/export duties. This watch has a sentimental value for me, as it was the first chronograph I bought abroad from a brand that was not loved by local jewelers stores or watchmakers at that time period in my country.
@@JosFiner I inquired at customs, there is an "Outward processing form" available mostly for businesses (+ broker fees + VAT on repair and or import duties on the repair). I can of course book 2 holidays in G.B. :-)
How does the Ronda 517 compare with the older eta movements that are now installed in the cwc watch range in terms of quality, accuracy, reliability etc? Thank you for your help. Best regards, Stefano.
well we know where the right one ended up!
I have a Bucherer that's front- loaded and couldn't find anything on it on youtube!! Thank you. The rotor stopped spinning before I bought it and it's a bit of a project (if I can anyway. i won't test it and may have to send it off to be fixed) thank you for this video
Hello, how old is this unit? I thought they use rondas now..
They do use Ronda movements now. They were introduced in divers from 2022. The majority of CWC divers produced such nice 1983 have ETA movements, and 100% of pre-2022 production, including all issued CWC Royal Navy and SBS divers.
This is so informative
Thank you for guidance..
Great videos! Did you notice any stamps/text on the inside of the caseback? Just curious.
Thanks very much indeed. The issued 1990s issued RN divers have 'Brevet 503305' stamped inside the case back. The 1985 RN diver has additional text underneath - ' MRP SA', Stainless Steel', Swiss Made', and 1017. f65-85 - not sure if the last number is common to the whole production run. The SBS watches also have ' Brevet 503305'. Don't know about the 1983 RD diver (would have to check) or the pre-quartz divers.
I’m pretty sure it’s “counterclockwise” and not “anticlockwise”(?)
British English. www.quora.com/Are-counterclockwise-and-anticlockwise-the-same#:~:text=%C2%B7%203y-,Is%20anti%20clockwise%20and%20counterclockwise%20the%20same%3F,is%20an%20American%20English%20term.
@@sumacwatches6149 That’s weird. Generally us Canadians lean British English over American English.
@@j_holtslander Now you know to never question a Britbong's English.
Hope this works on Chinese made cheap dive watches also, about to see soon if it does.
It'll be the same process
Brilliant work!
Thank you Chester! Too kind.
Brilliant rescue Jos, well done!
Amazing work Jos. Bravo!
Lovely looking watch that 👍
Thank you for sharing this hack!
You are welcome!
Thank. Good video. But I’m trying to re set hands on a Hamilton jazzmaster quartz. Is it a front removal cuz I the movement won’t come out the back side. It’s just rotates in circles now. And I can’t seem to find anything online that shows. Only the movement already out from case
Hi, I'm not familiar with that particular watch but if the back is not removable then, yes, it will be a 'front loader'.
I cannot thank you enough for this video i cried when the watch my grandfather gave me suddenly stopped clicking into place after gitting hit with a baseball i thought it wouldn't be fixed again and i started crying but I fixed it thanks to your video THANKYOU❤❤❤❤
Very please to hear that! Well done for fixing it.
What size is the crystal? I have a 1976 with a crack that I would like to replace. I have seen 30.5 and 30.8…do you have a definitive answer? Please and thank you!
The correct size is 30.6.
@@sumacwatches6149 THANK YOU!!! So like a Sternkreuz 306 with chrome ring? Mine appears to have chrome ring in there now.
Yes, that will do it. The original tension ring was matte but these are unobtainable. If you can get the supplied ring lightly bead blasted that will gie you the correct finish. Failing that go over it with some 3M abrasive pad to give it a more brushed finish and that will take the shine off it.@@patrickhewitt14
@@sumacwatches6149 thank you, thank you, thank you! Ahhhh I really really appreciate this!!!
got to love that CWC RAF Pilot Chrono!
Can you remove those fixed spring bars?
You would have to cut them off and then drill the lugs to take spring bars. People do this sometimes but the fixed bars are a feature of the watch. Removing them devalues the watch and so most collectors would leave the fixed bars in place.
did the same but pass it under so you dont see it and put both buckle closer to each other so i can wear them under the wrist in a way they kinda look more uniform
That works great 4me, thanks !
Nice work. Have exactly this strap and was considering such. Youve done the thinking for me. Cheers.
Hey do you know where I can find a gasket kit for a royal navy diver?
Hi, I have back gasket, and the two gaskets for the crown (round gasket and flat gasket).
You have them for sale?
I can supply a set yes. £15 plus postage from UK. You can contact me via direct message @sumacwatches on InstaGram.@@phobia97183449
nice approach ... I'll try mine (currently tossed in a drawer)
What a great and informative video! Thank you! I am a proud owner of a 1977 CWC W10 and I wanted to ask if you know why the crown could be a little wobbly on mine? Is there any gasket in the crown that might be missing on mine, or maybe the two prongs of the crown's part of the stem are too loose?
Thanks you very much Dumitru. Wobbly crown could be missing crown gasket, or just very worn/perished gasket, could be missing friction-fit washer that holds the gaskets in place inside the crown, could be wrong diameter crown or pendant tube. Loose/word joint between the two halves of the stem will not help, but would likely result in the outer stem/crown coming detached quite easily as well.
@@sumacwatches6149 I knew that your experience would play a big role here. Thank you so much for the answer! Is it feasible to find a gasket somewhere, or a whole crown assembly maybe? I could try contacting the current CWC company, but not sure if they would be able to help with the 70's model parts.
@@dumitrugulipe731 Sorry for the slow reply Dumitru. The original crown has a double gasket (i.e. two o-ring gaskets, one on top of the other) and they are quite fiddly to get out, but there are replacement gaskets available. Replacement crowns can also be sourced, but will need a new outer stem as they have a different tap size for the stem thread, and the new outer stem then needs to be trimmed to the correct length.
@@sumacwatches6149 I have actually taken out the crown using your method and it did not come off easy, so the joint between the two halves is ok. What I have seen upon inspection though is that the pendant tube is Inna good shape, no scoring or signs of use and the crown seems to be of the right size (5mm outside diameter), however I couldn't see any gaskets on the inside of the crown, it's empty (I have taken pictures and compared to a Hamilton W10 crown I found for sale) and I think that this is the actual problem with mine and why the crown is wobbly. Do you maybe know where I could get some replacement gaskets please? Thank you in advance!
Are you in the UK?
Thank you, i just ran into this problem
So, my retaining spring came out and in no way i can place it back good enough so the bezel will hold. Very frustrating. Do you have any tips or tricks?
Step 1. Retaining spring must be completely flat. Put it on a flat surface to check. bend the spring wherever it is not flat to correct it. Keep going until it is touching the flat surface all the way around. Step 2. When it is fitted the angles of each section should touch the back of the recess into which it fits. Again, bend the spring at the angles until each of the angled bends is touching the back of the recess. It takes a bit of trial and error. Step 3.Make sure that each straight section does not project out too far from the inside of the bezel - just slightly is correct. If necessary, bend the straight sections so they sit further back (this will mean doing step 2 again...).
@@sumacwatches6149 Thanks! i flattened it and with some patience, some glasses to fix my sight and some watch tools i succeeded!
@@joypadretro2797 Hooray! Well done.
@@sumacwatches6149 Thanks chap!
How to get the bezel off of the case? My bezel is turning freely and need to fix it. Tried to pry it off but there seems to be no gap to place a tool in.
I've got a click spring similar to this but cannot work out which way it should face.....it keeps popping out everytime I take my finger off.
The end that has a 90 degree bend will always point away from the bezel so that it can fit into the hole in the watch case, which means that the spring can only face one way. If it keeps popping out it may need to be slightly re-shaped so that the ends fit into the slots in the underside of the bezel.
Early days for me Jos in this 'ere watch bashing game. I now have to bin my rubbish watch press ......... it has been useful but I can see it's faults. I have been looking for a better one and you have pointed the way thanks. At least the dies will be useful. Easy to understand videos Jos well done.
Thank you! It's an ongoing process of upgrading kit - it never ends!
@sumacwatches I spent 50 years in the building trade Jos and have so much kit from that trade. Really enjoy going to a totally different scale of work gear though.
Very informative, thank you.
Thanks Tim
Fantastic job 👍
Thanks, much appreciated
Thank you for this excellent tutorial. Now that I have removed the case back, could you do a tutorial on how to get it back on?! (I don’t have and have never used a crystal press, but would buy one I think.)
Hi, yes, you need a crystal press to get the back on again. Have a look at our latest video as this does have some advice on crystal presses, and in particular the type to avoid. You don't have to spend a fortune for a decent one - this one on Amazon one £25 and would be fine - www.amazon.co.uk/Quartz-Mineral-Crystal-Fitting-Repair/dp/B09H5YGHC9/ref=sr_1_38?keywords=watch+crystal+press&qid=1679903382&sr=8-38
Very helpful thank you
Hey do you know if it’s possible to fit a bezel on the watch which isn’t meant to have a bezel
Not really.
@@sumacwatches6149 perfect timing iv just got the watch it has a bezel insert that I can remove that holds the glass in place the only thing it looks like it’s missing is the hole at 12 o’clock
@@neal7159 May have a ratchet washer/plate instead of spring. It will be a flat circular plate with small tabs sticking up, that sits under the bezel. Replacing the bezel is the same principle though, push and twist.
@sumacwatches6149 You make things look too easy. When are you going to do a video for the current manufactured CWC SBS DIVER ISSUE (QS120-DD) and where to get the Friction Ball for it to remove case in the field, which batteries and internal parts subject to loss in field are required, Is there a brand and make of Friction Ball you recommend, please link. I take it, not made in Asia! Next point, what about the environmental pressurized seal, is refilling that seal somrthing we can do in the field? If opening the case back, results in loss of the pressure seal, then how much of a "military" fit watch is this? Imagine if all your other kit, lasers, optics, night vision, etc., lost their pressure seal when you open the battery compartment to replace batteries, just to be on the safe side, before going out each night. You see the point? Even if an Aimpoint T2 battery lasts 7+ years while in the ON position, some people like to change out batteries in everything before going out that night. That's a basic requirement and expectation, in a "military" watch, you would think.
Hi, sorry for slow reply. For friction ball buy Bergeon brand - you can get from Amazon and they are quite cheap. Batteries are covered in the video on CWC diver battery replacement, although the later divers with ETA movement have a slightly different set up inside, and the more recent watches have a Ronda movement. There are no internal components other than battery that should require replacement in the field. Silicon grease may be handy to re-grease the case back gasket if the back is removed for battery replacement.
Thank you for the info, I struggled opening one of my G10 6B (Air force) variants as these have no battery hatch. Broke even a case opener knife on it... All fine know but pressing the caseback on the watch again needs a good caseback press.
Sounds like it was well stuck on! Yes, you need a good crystal/case press to snap the case back onto the mid case. There is some information on crystal presses in our newest video.
thanks for the video, are you able to do a vid for an early 80s fatboy?
Next on the list! Will show case back removal, stem extraction and removing movement from the case. Should be up with the next week or so.
Awesome vid mate :)
Thank you!
Any idea where can i get one of those springs?
Hi, sorry, didn’t see your comment. Contact me via Instagram and I can help you if you still need one.
@@sumacwatches6149 OK 👍