Omega Seamaster calibre 284

I’ve featured a few Omega Seamasters before but never a calibre 284 so I thought this one worthy of inclusion! It arrived for a movement service and to have a caseback seal fitted as there wasn’t one present.

Omega Seamaster calibre 284

It has a slightly worn back but the Omega symbol and hippocampus are still visible albeit faintly.

Omega Seamaster calibre 284

Once the back is removed you can see the calibre 284 movement in all its glory.

Omega Seamaster calibre 284

With the movement uncased and the hands removed you can see the dial was a little grubby but I cleaned the worst off with a cotton bud and saliva!

Omega Seamaster calibre 284

Once I removed the dial the calendar side can be seen….

Omega Seamaster calibre 284

….which was soon stripped.

Omega Seamaster calibre 284

I turned the movement over to allow me to start on the motion work side. As you can see it has a weighted balance and indirect seconds drive.

Omega Seamaster calibre 284

I took the power off then removed the balance and pallets….

Omega Seamaster calibre 284

….then the train and bridge….

Omega Seamaster calibre 284

….and it was soon fully dismantled ready for cleaning.

Omega Seamaster calibre 284

Omega Seamaster calibre 284

The only thing that needed replacing was the mainspring due to a broken hook, so one was ordered and I started the reassembly without it. Here the wheel train and bridge has been fitted.

Omega Seamaster calibre 284

The balance and pallets were next….

Omega Seamaster calibre 284

….then the movement was turned over and the dial side was rebuilt.

Omega Seamaster calibre 284

With the absence of a new mainspring that was as far as I could go so it was put away until it arrived.

Omega Seamaster calibre 284

Once the postman had been I carried on with the rebuild, heres the new mainspring ready to be fitted.

Omega Seamaster calibre 284

Omega Seamaster calibre 284

The barrel was refitted….

Omega Seamaster calibre 284

….then the bridge and wheels.

Omega Seamaster calibre 284

The cleaned dial and handset were refitted….

Omega Seamaster calibre 284

….and the movement was recased. A new caseback seal was also installed.

Omega Seamaster calibre 284

And that was it, another Seamaster bought back to health. Lovely little timepieces aren’t they?

Omega Seamaster calibre 284

Omega Seamaster calibre 284

Omega Seamaster calibre 284

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