Parts list · Chronostop

Omega 865 parts list: the Chronostop parts people hunt, and what else fits

The calibre 865 is the hand-wound, single-pusher chronograph in the Chronostop, from about 1966 to 1970. Omega's GF 620-4 catalogue lists 96 part numbers for it. Here are the ones people hunt, with the Speedmaster calibres that share each one. Most of the 865 is Speedmaster: 70 of its parts are shared with the 860 family, so a broken 860 or 861 is a parts source for it, and the other way round.

Size27 mm across, 5.70 mm high

Beat21,600 an hour, one pusher

MarkedOn the balance cock, not the plate

Find 865 parts on eBay

Whole movements and donors first. The parts people hunt have their own searches below.

865 movementcomplete, for a swap or partsFor sale now What they sold for
865 partsloose parts and lotsFor sale now What they sold for
860 movementdonor: shares 70 of the 865's partsFor sale now What they sold for
861 movementdonor: shares 63, but costs moreFor sale now What they sold for

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What else fits

70of the 96 parts are also listed for the 860, the Speedmaster family's base calibre

63are also listed for the 861, the Speedmaster Professional movement

23are listed for the 865 alone: its plate, bridges and single-pusher works

Every part the 865 shares with the Speedmaster family is listed for the 860, so an 860 is the most complete donor; the 861 shares 63 and the decorated 863 shares 45. The catalogue's 865 section is dated 1967, two years before the 860's own section, and it already uses 860 part numbers. For the same interchange seen from the Speedmaster side, see the 861 parts list.

One pusher, not two. The 865 runs its chronograph from a single pusher, and the parts that do it are its own: the operating lever, hammer, hammer spring, hammer bolt and bolt spring are listed for the 865 alone. A two-pusher 860 or 861 won't supply them.

Check the motion work. The cannon pinion, centre wheel and hour wheel are the H0 versions, listed for the 860 but not the 861 or 863. Match the number before taking them from a Speedmaster movement.

Looking for one part across every calibre? Search it in the parts finder.

The parts people hunt

Nineteen of the 865's 96 parts: the ones that wear, break or go missing, and the ones that sell. Each has a live eBay search, and Every fit opens that part in the parts finder with every calibre it fits.

Part no.	Part	Also listed for	Find it
860.1208	Mainspring	860, 861, 863	eBay Every fit
860.1200	Barrel with arbor	860	eBay Every fit
865.1106	Winding stem	865 only	eBay Every fit
860.1109	Setting lever	860, 861, 863	eBay Every fit
320.1111	Yoke	860, 861, 863	eBay Every fit
860.1218	Cannon pinion, H0	860	eBay Every fit
860.1305	Escape wheel, pivoted	860, 861, 863	eBay Every fit
860.1316	Jewelled pallet fork and staff	860, 861, 863	eBay Every fit
860.1321	Balance staff, pivoted	860, 861, 863	eBay Every fit
860.1327	Balance with hairspring, regulated	860, 861, 863	eBay Every fit
860.1030	Balance cock	860, 861	eBay Every fit
860.1347	Incabloc, upper	860, 861, 863	eBay Every fit
860.1712	Coupling wheel	860, 861, 863	eBay Every fit
865.1720	Operating lever, mounted	865 only	eBay Every fit
865.1728	Hammer, mounted	865 only	eBay Every fit
865.1734	Hammer spring	865 only	eBay Every fit
865.1705	Chronograph runner, mounted	865 only	eBay Every fit
860.1911	Casing clamp	865 only	eBay Every fit
2236	Screw for dial	865 only	eBay Every fit

The other 77 parts, from screws and jewels to springs and bridges, are in the parts finder. Type a part number, or the calibre and the part name. Search the 865's parts

Source: the 865 section of Omega's GF 620-4 spare-parts catalogue (1967, folios 1 to 5), as transcribed into the Watch Breaker parts database. "Also listed for" means the same part number is printed for that calibre in the Speedmaster family (860, 861 and 863), in Omega's catalogues or technical guides. The parts finder shows every calibre a part fits. A part number's prefix shows the calibre it was first made for, not every calibre it fits. If you find a mistake, email id@watchbreaker.com and I'll check it against the page.

Not sure it's an 865?

With the caseback off, look for the calibre number on the balance cock; the 865 is not marked on the plate. One pusher on the case, hand-wound, 27 mm: that is the Chronostop layout. Two pushers means a Speedmaster family movement such as the 860 or 861. The calibre lookup has the specifications, and the Genève guide lists the Chronostop references (145.0009 and 145.0010 for the 865).

Buying parts for a watch you're not sure of?

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Questions people ask

Are Omega 861 and 865 parts interchangeable?

Many are. Of the 96 part numbers Omega lists for the 865, 63 are also listed for the Speedmaster's 861, including the balance, escapement, shock protection, keyless works and most of the chronograph coupling. The plate, bridges, winding stem, fourth wheel and the single-pusher works are the 865's own.

What is the Omega calibre 865?

The hand-wound, single-pusher chronograph movement in the Omega Chronostop, from about 1966 to 1970. It measures 27 mm across and 5.70 mm high, beats at 21,600 an hour, and is marked on the balance cock rather than the plate.

Which parts are unique to the Omega 865?

23 of its 96 part numbers are listed for the 865 alone: the plate and bridges, crown wheel and core, winding stem, fourth wheel, chronograph runner, the single-pusher operating lever, hammer, hammer spring, hammer bolt and bolt spring, the pallet and roller jewels, the casing clamp and a few screws and jewels.

Where can I buy Omega 865 parts?

Swatch Group stopped supplying spare parts to independent wholesalers at the end of 2015, so 865 parts come from used stock and donor movements. The parts people hunt are listed on this page with live eBay searches, and the parts finder shows which calibres share any part.

Watch Breaker is an independent identification specialist and parts dealer and is not affiliated with, endorsed by or connected to Omega SA or the Swatch Group. Omega is a trademark of Omega SA. Part numbers are Omega's, transcribed from printed catalogues; no catalogue pages are reproduced. Terms.