I cleaned up the other derelict Singer 15. It is old old - some one took the finish off down to the metal on the base of it. The rest is just pretty well worn - anyway I cleaned it up and made it stitch. This one doesn't have a motor boss but someone put a motor on the back. Probably when they took off the big wheel for the treadle. It would treadle nicely I guess. I still want to fine tune it a little. I was amazed how different two Singer 15 machines can be.
Then I picked up a Singer 223 today. I'm very intrigued. I haven't done more than peek at it. I know it is all metal, very heavy, does zz, blind hem and ss. It is made in Japan. Not too many Singer's claim to be made in Japan. I'm guessing from the mid 1960s. I should dig around for a manual.