When we purchased our Randall harness stitcher, it came with this (antique?) bobbin winder. (EDIT, no, I have no idea what the yellow/gold thread is in the background, it came with, it burns, not melts, so I think cotton?)
(Yes, I know Campbell-Randall sells a really scookum powered winder, its on my wish list )
I'm 99% sure its what the fellow before us used it to wind bobbins, as it was oiled and in a good, usable state, but since he's passed, no chance of asking him.
So, I **think** there