Picked this up at auction, needs crown and stem. Seems to be in great condition other than missing parts. I think it's from the 1920s but not sure, any info or advice on repair would be appreciated.

 

Nice dial, it looks like one of the eras workhorse movements 10.85 or 10.86- I would think you should find parts easily.
You need an independent professional watchmaker to sort it out for you. best regards