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The Watch Breaker Journal, No. 11

Omega Dynamic: which movement is inside, reference by reference

9 October 2026

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“Omega Dynamic” on a listing tells you the name on the dial, not the movement. Omega put the name on 14 references between 1967 and 1979, and between them they carry 11 different calibres: big automatics, slim hand-wound movements, two day-dates and a small 17.50 mm family. Here is every one from Omega’s own records, with the calibre that belongs in it, so you can check a watch before you buy it or hunt parts for it.

Strip a 565 on The Bench

Quick answers

Every vintage Dynamic, with its calibre

ReferenceOmega’s nameYearsCalibreWindingCase
ST 165.0039Dynamic I1967 to 1974552AutomaticSteel, 41.5 × 36.4 mm
ST 135.0033Dynamic I1968601Hand-woundSteel
ST 136.0033Dynamic1968613Hand-woundSteel
ST 565.0015Dynamic1968671AutomaticSteel
CD 566.0015Dynamic I1968 to 1977681AutomaticGold-capped steel, 30 × 26 mm
ST 166.0039Dynamic I1969565AutomaticSteel
ST 166.0079Dynamic I1969752Automatic, day-dateSteel
ST 166.0145Dynamic (De Ville)1971 to 1979565AutomaticSteel, 39 mm
ST 166.0107Dynamic I19721481AutomaticSteel
ST 166.0108Dynamic I1972 to 19761022Automatic, day-dateSteel, 41.5 mm
ND 166.0144Dynamic II (De Ville)19731022Automatic, day-dateGold-plated
ST 166.0187Dynamic19731012AutomaticSteel
ND 166.0146Dynamic (De Ville)1973 to 19751012AutomaticGold-plated, 41.5 mm
ST 566.0073Dynamic I1974684AutomaticSteel

Omega’s vintage database. Sizes are given only where Omega’s record gives them.

Omega used three names: Dynamic, Dynamic I and, once, Dynamic II. The records don’t tie a name to a movement: the Dynamic I alone covers the 552, 565, 601, 681, 684, 752, 1022 and 1481. That is why the reference is the only reliable guide.

The calibres, from the factory catalogue

CalibreOmega’s designationJewelsBeat an hourSizeBuilt onPart numbers we hold
55227.90 RA SC PC AM 24p2419,80027.90 × 4.50 mm55019
56527.90 RA SC PC CAL CORR AM 24 pierres2419,80027.90 × 5.00 mm563132
75227.90 RA SC PC CALD CORR AM 24 pierres2419,80027.90 × 5.68 mm563116
101227,90 T1 RA SC PC CAL CORR STS 23 pierres2328,80027.90 × 4.25 mm101099
102227,90 RA SC PC CALD CORR CORJ STS 23 P2328,80027.90 × 4.80 mm1010106
60127.90 SC TI PC AM 17 pierres1719,80027.90 × 3.35 mm60088
61327.90 SC PC CAL CORR AM 17p1719,80027.90 × 3.85 mm61031
68117.50 RA SC PC CAL AM 24 pierres2419,80017.50 mm670103
68417.50 RA T1 SC PC CAL 24 pierres2421,60017.50 mm683107

Designations, jewels, beat and size: Omega GF 620 catalogues. Part counts: the Watch Breaker database today; it grows as more of Omega’s books are loaded.

Two pairs matter most for parts. The 752 is the 565 with the day added (CALD in Omega’s designation is calendar with day): 103 of its part numbers are shared with the 565. The 1022 is the day-date of the 1010 family, and it shares 91 part numbers with the 1012. The 1012 and 1022 beat at 28,800 an hour, against 19,800 for the 552, 565 and 752, so the later Dynamics are the faster movements.

Which one is in your watch

Hunting parts for a Dynamic

A Dynamic’s movement parts are the same parts as any other watch with that calibre, so the field is wider than “Dynamic” listings suggest. A 565 part pulled from a Seamaster is exactly right for ST 166.0039, as long as the Omega number matches. The parts finder shows every calibre a number fits, and the 565 parts page lists the ones people hunt. Case parts, crystals and bracelets are another matter: those follow the reference, and the crystal lookup is the place to start.

Omega Dynamic on eBay: For sale now What they sold for

The later Dynamics

Omega used the name again. Its records list Dynamic II quartz models in 1984 under Seamaster (calibres 1426 and 1430), and an automatic Dynamic collection from 1995 to 1999 (calibres 1108 and 1138). Those are modern watches with different movements, and this page is about the vintage ones.

Take one apart

The 565, the movement in ST 166.0039 and ST 166.0145, is on The Bench, free in your browser: every part and screw with its Omega number on screen, taken off in bench order and built back up.

Play the 565 BenchThe Genève guide

Questions

What movement is in an Omega Dynamic?

It depends on the reference. Omega’s records list 14 vintage Dynamic references with 11 different calibres: the automatic 552, 565, 752, 1012, 1022 and 1481, the hand-wound 601 and 613, and the small 671, 681 and 684. The reference inside the caseback tells you which one belongs.

Which Omega Dynamic has the 565?

Omega lists two: ST 166.0039 (1969) and ST 166.0145 (1971 to 1979). The day-date ST 166.0079 (1969) has the 752, which is the 565 family with the day added.

Is the Dynamic a Seamaster or a Genève?

Omega’s records file the vintage Dynamics under Genève, with three later references under De Ville (ST 166.0145, ND 166.0144, ND 166.0146). The 1984 Dynamic II quartz watches sit under Seamaster, and the Dynamic of the 1990s is its own collection.

Do Dynamic movement parts fit other Omegas?

Yes, by calibre and part number. The 565 in a Dynamic is the same 565 that is in a Seamaster, and the 752 shares 103 of its part numbers with the 565. The 1012 and 1022 share 91. Buy by the Omega number. Case parts are different: match those to the reference.

When was the Omega Dynamic made?

The earliest vintage Dynamic in Omega’s records is ST 165.0039, from 1967, and the latest mechanical one runs to 1979 (ST 166.0145). Omega used the name again for quartz Dynamic II models in 1984 and for an automatic Dynamic collection from 1995 to 1999.

Not sure what is in yours? The Movement ID report is US$75: the calibre read from the movement, checked against the case reference and Omega’s catalogues, with nothing to pay until we confirm your photos can answer it.

Get it identifiedThe Genève guide

Sources: Omega’s vintage database for references, names, years and case sizes; Omega GF 620 catalogues for designations, jewels, beat and sizes. Watch Breaker is not affiliated with, endorsed by or connected to Omega SA or the Swatch Group. Omega, Dynamic, Seamaster, De Ville and Genève are trademarks of Omega SA.