Looks like a nice pick-up that just needs a little TLC from a watchmaker.
With the dial, it's hard to tell exactly what I'm looking at, but perhaps the watch has the wrong crystal installed, and needs a crystal with a retaining ring. Can you tell from your research on other examples?
Regarding the crown, it could just be that someone did not adjust the length of the stem correctly, but it's weird that Bonhams would have sold it that way, and that the seller would have lived with it for 6 years.
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