Very nice all round.
As Padders said, a model reference 132.004. This type was also used as a presentation watch due to the unmarked caseback all ready to be engraved.
Gold case was made for Omega by Serva S.A. of La Chaux-de-Fonds, Switzerland.
If you wish to wear it and have it running it
should be serviced. If you continue to run it you risk wearing out the gears and jewels (bearings) due to aged lubricant and dry pivots. These aparts are becoming harder to get nowdays and consequently, cost more than they used to if they need replacing.
$600 sounds a bit high but even if you go direct to Omega you're looking at AUD$950.
Omega Australia pricing:
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