This caterpillar D-7 was bought brand new in 1953 I believe by my great uncle who owned Felix and Ferrick's construction. they did big construction work consisting of building highways and major buildings back in the 50s and 60s they had two caterpillar D-7s and two Bucyrus Erie 15b power shovels the equipment is still in use today not every day for a business because the business went out of business sometime in the 70s I believe but it still gets used at antique steam and tractor shows when the business went out of business they had a big sale and sold all of the equipment so it left our family for a long time but through the Pioneer Steam and Gas Engine Society of northwestern Pennsylv...