Originally Posted by vintagemotif
Thank you Vintagemotif. I got the machine at a garage sale for $40. Singer can not completely adentify it as records are lost. They seem to think it is a 15-91. Nancy is the one that posted the pictures for me. Thank you Nancy. You are a sweetheart. Kathie
If the machine has a potted motor, it is a 15-91. But if your machine has an external motor (or added motor) than it isn't a 15-91. It could be 15-90 or 15-89. More info to read with pictures of the differences in the machines:
http://blog.sew-classic.com/2008/10/...ne-review.aspx
Yes, Monica is right - 15-91 is a potted motor, but the 15-89 is a HC. Here are the Class 15 machines.
15-30 very early treadle - early 1900's, 1895 - 1933
15-88 Treadle
15-89 HC
15-90 Electric/external motor
15-91 Electric/potted motor gear driven
15-96 Treadle 1940's +
15-98 HC 1940's +
15-125 Electric after 1950
Nancy