Hi,
I recently bought vintage Omega Seamaster. I do believe that it's the model ST 366.0848 (https://www.omegawatches.com/planet-omega/heritage/vintage-details/14589/). One thing that bothers me, is that the movement is non-hacking. However, according to information that I gathered about calibre 1020, this movement should be hacking. Otherwise all functions works exactly as the manual says. Can this be because of a broken lever inside the movement? I have also noticed that the small circular plate on which the serial number is usually stamped is missing. It might also be that this is not cal. 1020, but some other, despite what can be seen on pictures.
Any ideas on this? Thanks for response. I actually quite like this piece. It has nicely repainted blue sunburst dial and most surprisingly, this watch keeps time quite accurately (within 30 seconds difference a day.)