I have a question about the class 15 bobbin cases for the zig zag machines.
There are 2 different part numbers for them, one for the side loading machines and one for the front loading, but I can't see a difference in the cases at all... of course the price is different on the 2, which implies that there is some difference....
As for the bobbins - there are a couple of different qualities of bobbins. I have about 5 different choices in the spreadsheet for my supplier, all of course with different costs. MOST places, Hancocks, Joann and even a lot of the the LSM places will stock the cheaper quality because (they think) people won't pay for the "better" cost, especially when they apply their 200 - 500% markup.
The newer machines don't care as much about the quality control on the bobbins. I have never had trouble buying the higher quality ones, even in vintage machines. The part number for the metal 15 bobbins I ordered is: 2518-A. I haven't had to order class 66 bobbins from my supplier because i have 3 parts organizer drawers of them from other machines.
