Howdy..
I found the number for mine on the plate..#109098 and on a spare motor is #107152.
I found a site that has serial numbers and if it's correct..mine is a 1937 and were discontinued in that year...the last number that was on the list was just 53 more made before the ended them...and the spare motor is a 1935.
I had a local guy that dabbles in about everything tell me a lot of numbers are casting numbers but if it's &quot;stamped&quot; then that should be a serial number of some sort.
I have it at my house now so I will post some pix when I get a chance.

It looks like you care comming along with your pretty nicely.