Dial isn't in perfect shape but looks original to me. The crown is also suspect. Looks like it needs a service and some movement screws. Quick google search reveals that 14-million serial number puts it at 1954. Inside the case back should be able to get you a reference #
What interests you in that model? I might hold off unless it is cheap. After looking a little more at the movement to try to get you the bumper caliber, the movement just looks dirty, which is never a good sign IMO.
Could be a cal 340 (28.10RA PC) http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Omega_28_10RA_PC you're missing the springs that pushes the 'bumper' weight back and forth. someone cannibalized them for another movement?
Not a 28.10RA and springs are under the rotor bridge. Look at the ends of the rotors which have half flat ends. Bumpers with round springs have flat faces DON
oops, good catch (Don), my mistake. ok, so 'rotate' the bumper weight CLOCKWISE to it's max position and the cal number will be revealed (just above the Ratchet wheel) (or 'below the ratchet wheel' in the picture above). on the bridge plate.