MATCHING NUMBERS ??

On vintage Omegas the serial is only found on the movement, not on the case so there is no ‘matching numbers’. The check that should be done is to confirm the caliber/movement type is correct for the case reference and that the movement serial is in range.

I.e. a 60’s Constellation date ref 168.005 should have a chronometer calibre 564. The approximate year (either identified from the overall reference, sub ref, or any paperwork) should correspond roughly with the serial number charts.

The Omega Vintage Database gives an overview of specifics but is often incomplete.
https://www.omegawatches.com/en-gb/vintage-watches

Unfortunately there is no such end production information available.

You have to be careful how you interpret the production tables that are available as Omega tend to lump all similar references together.
E.G. the dogleg was first released in 1960 as the 14900 & 14902 (date) with the change of ref no. arriving in 62/63.

Actual examples from the first year of cited production are often (very) scarce - so you're likely to find 167.005 / 168.005 examples starting from 1963.

With 168.005 doglegs, the cal 564 was introduced around '66, so date examples before then (including the 14902) will have the cal 561movt.

It was thought by some that date doglegs with a 564 from the early 70s had a replacement movt but a sufficient number of examples have turned up -especially from the east - that it seems they were indeed produced into the early 70s.
It should be easy to spot these watches if they have black inserts, as they will have painted indices instead of onyx but caution should be exercised with any 70s movt dogleg.
Note: (correct) 70s doglegs are uncommon - but as time progresses we are likely to see more of them appear as owners pass them on

The 'easy find case and calibre matcher' is still working on Desmond's site.