Up for sale is a very nice Hamilton automatic. This is 10kgf or rolled plate. Its been customized on the back. It does run, but unsure of how accurate it is. I tried to get the case back off, but it looks like previous owners tried to get it off and couldnt and gouged it pretty good. None of the Amazon tools I have can get this off. I believe it will have the 689a movement. If you have any questions please feel free to contact me at any time!