When I looked up the info on the treadle machine I got earlier in the summer the website said model 15K from factory in Scotland 10,000 in that run in December 1947. I'm wanting to get a manual for it and don't know which model 15 manual to order. They list 15-88, 15-89, 15-90, 15-91 and 15-30 as the possibilities.
How do I know which one to get?

I believe they all use the same manual. At least my 15-86 treadle and 15-91 does.

That's exactly right. There were only slight differences between the 15 models....little features added, portables, in cabinets, etc. That's what the extra -91 -86 numbers signified.

This article, with pictures, might help you narrow down which 15 you have. This guy's blog is Awesome :thumbup: :

http://vssmb.blogspot.com/2011/07/vi...s_28.html#more

Thanks all! I was especially wanting the manual for info on replacing the missing belt and anything I might need to know about a treadle machine that is different from one with a motor.

The free downloadable manual on the Singer site is for a treadled model 15-30. :)

http://www.singerco.com/uploads/download/34_sm15.pdf

I believe that your machine may have some upgrades - the 15-30 might not have had the reverse stitch or droppable feed dogs. Everything else should be pretty much the same. :)

Thanks for that link! Very interesting!

I love my 15-91. Have i posted that yet today?