I got a Singer sewing machine in a cabinet this week from the thrift store. I am having trouble dating it. The numbers I found on it on the bottom were MD158625 and also Singer 173821. The model number is 237. The cabinet is in fairly good condition but the machine is missing some things I think. I was wondering if anyone could date this for me from these numbers or if I should look for more numbers. I can't seem to match these up on the site to date the machine. Thanks for your help. I didn't have my camera charged to take a picture.