Standard Rotary Treadle
 

Does anyone know where I can buy some bobbins for my 1904 Standard Rotary Treadle? My sewing machine guy says it would help if I knew what class it is. Does anyone know where on the machine I would find what class it is? Thanks for any help you can give me.

I have found this... https://www.worthpoint.com/worthoped...ine-1806765077
Don't know if that can help...

On these older machines, bobbin "class" is meaningless except for the Singers. Each US company made what they wanted and most were different- unless they were copying Singers. Most of them - nothing will work but what was made for that manufacturer.

However, I'm pretty sure this one is close enough to a class 15 that you can use it.

I'm pretty sure that Glen over on the VSS reported having used the 15 bobbin. I know it's not an exact match, but what is important is if it will fit in the bobbin case and spin freely.

Now - Standard had the older "slim" version and the newer "stout" version. I believe yours is the slim. The bobbin cases for the two are different and I think the 15 bobbin may only fit in the older one. I'd suggest trying it and see.

The OEM bobbins for the two are slightly different, but I was able to swap them between machines - the bobbin cases are not interchangeable.

http://i31.photobucket.com/albums/c3...pswt1diuiu.jpg

Yes I have used the 15 bobbins in my Standard but I use only the vintage class 15 bobbins. Never had a problem with them.

Thanks for chiming in Glenn!

I was looking at my pictures of the Singer 15, and found the pictures comparing the bobbins,

left is Standard, class 66 middle and class 15 right.
http://i31.photobucket.com/albums/c3...ps2f931361.jpg

And this shows the Standard and 15 from the top view.
http://i31.photobucket.com/albums/c3...ps0a606d20.jpg