Brand Guides / Omega / Omega Speedmaster Professional
Reviewed by the Fine Watch Guide team · October 2026
The Speedmaster Professional, the Moonwatch, descends from the 1957 Speedmaster and was qualified by NASA in 1965, going on to be worn on the Moon during Apollo 11.
The Speedmaster Professional is a manual-wind chronograph that has changed less over the decades than almost any other watch in production. That continuity makes it a favorite with collectors and with independent watchmakers, who know its calibers well.
The Moonwatch has used a short list of manual-wind chronograph calibers over its life, from the early column-wheel movements through the long-running cam-operated calibers to the current Co-Axial Master Chronometer movement introduced in 2021. Each is well understood by specialists, but the newest needs current parts and equipment, while the older calibers are classic independent territory.
A chronograph service should check start, stop and reset, and confirm the chronograph doesn't drag timekeeping. Winding the watch daily is normal for a manual-wind Speedmaster; a crown that feels gritty or winds without resistance is a sign it needs a service.
The first Speedmasters used the caliber 321, a column-wheel chronograph that's now prized by collectors, and Omega has since brought it back in limited production. From 1968, the Moonwatch moved to the cam-operated caliber 861, then to the 1861, and later to the Co-Axial Master Chronometer caliber 3861, which joined the core collection in 2021.
Each generation has its own service considerations. The 321 needs a watchmaker who knows column-wheel chronographs well; the 861 and 1861 are well understood by independents; the 3861 is best serviced by Omega. Knowing which caliber you have helps you choose the right watchmaker.
Vintage Speedmasters are rewarding and frequently modified. Check that the caliber suits the reference, that the dial, hands and bezel insert are period-correct, and that the case hasn't been polished heavily. Service-replacement parts are common and not a disaster, but they should be reflected in the price.
A specialist who handles vintage Speedmasters regularly can spot mismatched parts quickly.
The bezel, pushers and crown are the parts most often replaced on vintage Speedmasters, and each has period-correct versions that collectors track closely. A watch with a correct bezel and original pushers is worth more than one with service replacements, even if the replacements look newer and cleaner.
It's a tool watch, but older ones aren't built for swimming, and even modern examples should have their seals checked before any water exposure. Hesalite crystals scratch easily and polish up well; sapphire versions resist scratches but can chip.
The Moonwatch has traditionally used a Hesalite acrylic crystal, the material NASA preferred because it doesn't shatter into shards. Hesalite scratches easily, but light scratches buff out with a polishing paste in a few minutes, and many owners like its warmer look. Omega also makes sapphire-crystal versions, often with a display caseback, which resist scratches but reflect more light.
Neither is wrong. Choose Hesalite for the historical look and the easy refresh, and sapphire for a crystal that stays clear for years with no fuss. On vintage watches, an original crystal is worth keeping if it's in reasonable shape, but replacing a cracked one is normal.
If you're unsure which crystal your Speedmaster has, tap it gently with a fingernail: Hesalite sounds dull and plasticky, sapphire sharper and glassier.
The Speedmaster Professional is a manual-wind watch, and winding it is part of the ritual. Wind it at about the same time each day, gently, until you feel resistance, and don't force it past that point. A Moonwatch that won't hold its power reserve or that suddenly feels different when winding is telling you it's time for a service.
Omega publishes service guidance for its watches, and a modern Master Chronometer Moonwatch runs a long time between overhauls. Vintage calibers want more frequent attention. If the chronograph seconds hand stutters or the reset doesn't snap back to zero, have it looked at before the problem spreads.
For a modern Moonwatch with the Co-Axial Master Chronometer movement Omega introduced in 2021, Omega's service network is the obvious choice. Older Speedmasters with the classic manual-wind calibers are bread-and-butter work for a good independent chronograph specialist, who's often quicker and more willing to keep original parts.
For pre-Moon and early references, find a watchmaker with real vintage Speedmaster experience and a clear policy of keeping the original dial, hands, bezel and pushers. Ask what they'll replace and get every removed part back. On these watches, originality is the value.
No. The Moonwatch is a manual-wind chronograph and needs winding regularly.
The Speedmaster Professional, after NASA qualified it in 1965. It was worn on the Moon during Apollo 11 in 1969.
It isn't a dive watch. Have the seals checked first and keep vintage examples dry.
Usually. Hesalite is acrylic and light scratches can be polished out.
Omega Speedmaster Professional owners use Omega specialists for servicing, authentication and restoration.
Design District, Miami, FL
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