I have a white rotary electric sewing machine in excellent condition with all the original attachments and bobbins and the original owner's manual. The machine is in a very nice "William and Mary Model" cabinet with the original paperwork still included. 1X34955X is stamped on the base of the machine in the back under the motor. I cannot find any other model numbers. Can anyone tell me the year of this machine or how to find the model number? I'm trying to determine the value.

Check eBay. Plenty of sewing machines for sale and don't get your hopes too high.

IF you can find a collector you might be able to get $100. - $150.
I see sewing machines for more on eBay but not sure if they get sold