The short answer

A replica Speedmaster Professional is an unlicensed copy of the Omega Speedmaster Professional, the 42 mm manual-wind chronograph Omega has sold since 1957. Prices run from about $60 for a quartz model to $600 or more for a copy built around a clone movement. No replica contains an Omega movement, and none is finished by Omega. Every unit carries the Omega name and logo without a license, so US law treats it as a counterfeit good rather than a homage.

Specs of the real watch

  • Case: 42 mm wide, 20 mm lugs, 13 mm to 14 mm thick.
  • Dial: black, subdials at 3, 6 and 9. The 3 and 9 subdials run the chronograph. The 6 subdial is running seconds.
  • Crystal: hesalite on the standard Moonwatch, sapphire on the 2021 reference.
  • Movement: Calibre 321 from 1957 to 1968, Calibre 861 from 1968 to 1996, Calibre 1861 from 1996 to 2021, Calibre 3861 since 2021. All manual wind.
  • Flight record: NASA qualified the watch in 1965. It reached the lunar surface on Apollo 11 in 1969.

Where copies differ

Subdial spacing is the first check. The real chronograph counters sit near the edges of the dial. The Seagull ST19 movement used in many copies pushes both counters toward the center. Cases also run thick. A copy that measures 15 mm is 1 mm to 2 mm over the real figure.

Other common tells:

  • Bezel text. On the real bezel the dot sits above the 90, not beside it.
  • Date window. The Speedmaster Professional has no date. A window at 3 or 4:30 is wrong.
  • Caseback. Reference and serial numbers repeat across units from the same batch.
  • Crown guards. The Moonwatch has none. Copies often add a shoulder at the crown.
  • Lume. Copies glow green or blue. Older real dials use tritium, later ones use Super-LumiNova.

Movements used in copies

  1. Quartz. Subdials do not function. The seconds hand ticks once per second.
  2. Seagull ST19. Manual wind, real chronograph, 21,600 vph. Layout does not match the real dial.
  3. Clone 1861 or clone 3861. Closer subdial spacing and closer beat rate. Cost and reliability vary by batch. Service parts are not available from Omega.

Inspection list

  1. Measure thickness with calipers. Anything past 14.5 mm is off spec.
  2. Start the chronograph. The 3 o'clock counter should move one step per minute.
  3. Watch the 6 o'clock subdial. It should step in small increments, not sweep.
  4. Read the dial text. "Professional" sits under "Speedmaster" in a set font with tight word spacing.
  5. Turn the crown. Manual wind should feel like winding, not like a rotor spin.

Legal status in the US

18 U.S.C. 2320 makes trafficking in counterfeit goods a federal offense. A first conviction carries up to 10 years in prison and a fine. US Customs and Border Protection can seize shipments and does. Selling a replica as a genuine Omega is fraud on top of the counterfeit charge. The same rules apply to a $60 quartz copy and a $600 clone. Nothing in this guide is legal advice.