"Personally, I've always heard that the frame of an engine marks its identity, and a boiler is secondary to that. Some may see it the other way around, but seeing how little of the boiler is still from 1126, I doubt it'd be the linchpin here".
Actually I think (pls note "think") it may be the other way around; the boiler distinguishes the engine note the builder's plate, etc. Replacing of frames (ex: new cast frames w/roller bearings on AT&SF 4-8-4's) was not uncommon.
Edited 3 time(s). Last edit at 08/20/2018 06:52AM by nedsn3.