So I haven't been updating this much as it was taking a super long time to get parts. I was able to order a new balance staff buuuut in the process of switching over the hairspring and little jewel thing (still learning) I damaged the hairspring quite badly. Before attempting this operation I made sure to check that I could order a complete balance from jules borel, just in case. So, $90 later, I had my new balance.
I was actually able to clean up the modifications that a previous watch "repairer" had done. I think they were trying to use a balance staff they had lying around to just get it running again but they really just made a mess of it. Putting everything back to factory brought the endshake into an acceptable amount. It's been running for a few weeks now without issue. Super happy to finally have fixed this watch and be able to wear it!!!
So I just picked up this watch from Ebay, thinking it would make a great special occasion watch. I figured I'd be able to identify the movement after disassembly but I'm afraid I'm just as lost as before. Does anyone have any ideas on what this could be?
What I know:
It's an Ollendorf movement. Ollendorf was an importer of watch movements. They have a cool logo.
The only markings are a 315 under the dial, which doesn't appear to match any movements in the Ranfft database.
Any help is super appreciated!
Some updates, I measured the mainspring barrel of a 6498 and it's 16mm. I also tried loading a 10mm mainspring on an undersized winder, it did not load fully. So I answered my own question hehe. thanks.