Mom has the other two.
I don't have the serial number handy, but I called Singer the other day and it was Born on April 20, 1948 in Elizabeth NJ, and it's a 221-1.
I have seen some that are a little less dinged up, but it still runs great.
I have to figure out how to grease the motor at some point, do you need a special fitting for that? Like a grease gun, or can I just use some lithium grease in a can?
My Mom has about a billion attachments for it. I may post a "Name that attachment" thread if I can get pics of all of them.