greywuuf

ok here is the pictures of my bobbin from the 103 this is the diameter,
here is the Diameter .837 inches


and this is the thickness
.359"


it is just slightly larger than the one from my 306(319) does it look familiar to anyone?

Charlee

Looks like the bobbins from my 115...and those would be a 20U

greywuuf

Thank you Charlee, I will look into that.

J Miller

Well, I measured all the bobbins ... 'er all the round bobbins we use, and the closest one I have to yours, is the bobbin to the 319K.
Measures out .830" diameter x .360" thick. +/- a few thousands variance between examples.

Sew-Classics has them in stock.

Joe

greywuuf

Thank you both, I had heard that the 306/319 could use an industrial bobbin,
So maybe I will luck out and I'll have two weird machines that use something common.