|Chris Pare wrote:
I was able to scratch the motor tag clean with my fingernail, I just needed some encouragement.Keep scratching with your fingernail to look for the FORM letter on the motor tag. The letter will be an S, T or V. During the WW1 period GE changed from a lot of brass to more steel; a steel cage replacing the brass cage, a brass plated or painted STEEL blade replacing the former brass blade (with some exceptions). There were other changes also but I don't know them all. There is a "look" to the steel blades of this period and your fans' blades have that look so is why I asked if a magnet stuck to the blade.
Magnet does stick to the blades