Oh my gosh! I just bought a similar machine at an estate auction yesterday. The bid began at $5.00 and there was at least one other person bidding. We went back and forth, until I got it for $32.50 -- first time ever in my life that I bid on an item at any auction.
I am a recent new member to this board and have not posted before today. I feel very lucky to have found machine so very soon after catching the "bug" of looking for vintage models from you wonderful members. I am so glad to have discovered this great community of quilters and eager to learn more from all of you.
According to the Singer website and the serial number I found on the front base, it is a 1924 model. This one has the knee control instead of the foot control. The plug should be replaced and maybe the entire electrical cord. It is the fabric kind and the plug is round. I think this machine was used heavily (had a 100 needle in it), but cared for -- no accessories or manual were included. I wanted it just for piecing quilts, so that is fine with me. The machine sews beautifully -- I did not need to oil it to get it started. I have been playing with the tension, stitch length, and presser foot pressure to get a feel for those adjustments. I've also done some quilt top piecing today; I am impressed with how quiet and smoothly she sews.