By looking at the pictures you know as much as I do. When I turn the pulley the rest of the workings do not move, they budge and try but there is resistance and then the pulley spins free. I don't know anything about these. Base was long gone when I recovered this out of a clean out so I know nothing about it's history or what could be wrong with it. If you have any questions or picture or questions feel free to ask, I'm very accommodating.
This item is in the category "Antiques\Sewing (Pre-1930)\Sewing Machines". The seller is "patthesalvageguy" and is located in this country: US.This item can be shipped to United States.