Got this guy off eBay to practice on before moving on to cleaning and lubricating a nice Elgin pocketwatch I have. Thought I'd share my progress.
I got the hands off without issue, then dressed up my screwdrivers and loosened the dial retaining screws. Two of them backed out no problem, and one just spun in place. I decided to take the movement apart from the back and see what I could do.
It didn't come with a crown attached, so I carefully let down the mainspring by holding the windin