Well, you sure aren't giving us anything to go on!
Okay: the case is hammered. Does that bother you? If it were me, I'd have it re-plated. I can only guess at the movement as being something from 1950-60, so
maybe a calibre 40-T (
http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&a&2uswk&Zenith_40_1).
My instinct is that it needs some TLC, so you should anticipate having it serviced and re-plated. You don't say where you're based, but I would estimate you are looking at around $100 minimum to service this movement (barring any problems within it) and around $50 to re-plate it. In the strictest sense - the eBay test - adding those costs to the probable cost of purchase and I'd suggest that you'd be taking on this project for love, rather than immediate profit.
But then, I do that all the time myself, so...
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