c1860s? Key wind/key set. The only marking I can see is JAM on the inside of the case back. Material appears to be silver, probably coin silver, but no markings. Engraving of a man with a scythe and a ship in the background on back of case. Movement is heavily engraved and skeletonized. It's engraved in such a way that the movement shimmers like a diamond. Very appealing.
 
Doesn't run. Balance staff appears to be broken. Dial has repaired damage and some chips/cracks. Engraving on back is worn but you can still make out what it is.
 
I have to admit I'm a little out of my element on this watch. I bought it because I loved the movement design and the intricate work. I had seen Chinese market watches online before, but none like this one with sales history. So needless to say, I have no idea where to price this. I know it's rare, but I don't know how that translates to price.
 
Measures approximately 45mm across.