Service: Omega Seamaster calibre 252

IMG_6808Huw sent in this ladies’ Seamaster. The crystal is quite scratched, and it is in need of a service.





The pendant tube is slightly rusted onto the winding stem, and they come off together. The washer shouldn’t be there, and the gasket isn’t original either. Somebody tried to make this watch a bit waterproof, but this isn’t going to work. It’s either a new crown and pendant tube, or nothing. I can’t get hold of a pendant tube, so I will have to leave it as it is. Most vintage watches aren’t water resistant, and I don’t let my Constellation anywhere near water, as the crown is original and the pendant tube has grooves as well.IMG_6817

The lovely calibre 252 with central second.IMG_6818

There is some rust on the winding pinion and winding stem, and I will get rid of that.IMG_6832

The movement taken apart and ready for the cleaning machine.IMG_7041

I start off with a new mainspring.IMG_7043

The barrel and gear train are back in, and I’m ready for the pallet fork and balance.IMG_7044

Wound and ticking again.IMG_7048

The winding pinion and winding stem look a lot nicer after I took the rust off with a glass fibre brush.IMG_7051

Nice beat rate and amplitude, and the beat error is fine for a movement where the beat error is corrected on the collet. The movement is so small, that I wouldn’t be able to make the beat error better than this.IMG_7053


With a new crystal, the watch looks very nice indeed. Poor Huw had to wait a good 4 weeks, but I hope it was worth it!

3 thoughts on “Service: Omega Seamaster calibre 252

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.