A colleague at work has just been given his late father in laws Omega Deville and asked if I'd replace the battery. I took the case back off which is stamped 1332 & found this slightly corroded 1337 movement inside.
You can see the corrosion from the battery and the black goo I assume is what's left of the rubber seal. This has leached onto the movement over time. I cleaned it up a little with some rodico, being careful to lift the particles of corrosion, but didn't hold a lot of hope for it. It hasn't cleaned up too badly. As far as I can tell this takes a renata 381 or 391 battery. Unclear due to mixed messages on different sites. I had a 391 so put it into the watch. It fired into life immediately, but all isn't well.
The second hand moves around quickly and the minute hand follows very slowly. The movement is set using a pusher near the crown and from instructions you're to push the pusher in with a pen nib or similar, hold for 5seconds, release, then push down again and hold. The second hand is supposed to move quickly and the minute hand follow, you then release the pusher at the correct minute. The hour and date are then changed using the crown. However, Releasing the pusher does nothing and the hands coninue to move quickly regardless.
i think it's long overdue a service, unless the battery type isn't right as this seems the most obvious answer. Any ideas gratefully received.
As an aside I think it must be a crossover year watch as the casebck says 1332 and the movement is a 1337. From omega's vintage archive this seems to suggest a 1979/80 era watch. Again I'd appreciate any thoughts. There's always the possibility the movement has been replaced at some point but given the appearance I doubt it.