Originally Posted by chris_quilts
Another vintage machine followed me home today. It is a Singer, serial #AH926813, which makes it a 15 but I believe a 15-91. .
Maybe this will help determine model...it compares 15s based on their bobbins
http://www.needlebar.org/main~nb/15chart/index.html
And here's a great review on 15-91
http://blog.sew-classic.com/2008/10/...ne-review.aspx