I just got this Sunday. My grandmother gave it to me.
My grandmother couldn't remember when the Singer sewing machine she has was made. So I found the Serial number on the right hand side of the machine and called Singer to find out.
It was made in Elizabeth, New Jersey on Oct 22, 1926. The factory was named Elizabethport.
If you do not want to call Singer you can go on their website and look up the serial number yourself. I didn't realize this until after I had already called customer service. Here is the link.