Removing the mainspring from a vintage Seiko watch movement

In part 4, we embark upon the tricky business of removing the mainspring from the barrel. This is always a somewhat hazardous operation, made somewhat more challenging in this case by the reluctance of the barrel arbor to detach itself from the inner end of the mainspring. Consequently, I removed the spring from the barrel with the arbor still attached. You can see whether this turned out to be a sensible move by watching the video!
Parts 1, 2 and 3 in this series can be found here:
Part 1: • Hot-rodding a Seiko 62...
Part 2: • Deconstructing a 39 je...
Part 3: • Disassembling the gear...
An introduction to this series can be found on my blog here: adventuresinam...

[@Seftdelmer]

Three years late but thank you. Subscribed.

[@jackjax7921]

what is the cleaning solution for the mainspring?

[@Aco747lyte]

My watchmaker daughter says she uses a Horrotec mainspring cleaner. It works more effectively than common lighter fluid.