What Is a Fake Speedmaster 40mm?
A fake Speedmaster 40mm is a counterfeit or replica Omega Speedmaster listed with a 40mm case width. Omega's Moonwatch Professional, the model most copies target, is 42mm, so a "40mm Speedmaster Professional" matches no genuine reference. The 40mm figure describes the seller's case, not an Omega spec.
Most of these listings copy the Moonwatch look: black stepped dial, three subdials, tachymeter bezel, and lyre-shaped lugs. The size is the first number to question, and the dial and movement give the rest away. Two questions sit behind this search: does a 40mm Speedmaster exist, and how do you tell a copy from the real thing?
Does Omega Make a 40mm Speedmaster?
Yes, but not in the Moonwatch line. Case sizes across the Speedmaster family vary by model, and the Professional has held at 42mm for the modern references.
- Moonwatch Professional: 42mm, hand-wound, no date.
- Speedmaster Reduced: about 39mm, automatic, discontinued.
- Speedmaster '57 and Racing models: 40mm to 41mm.
- Speedmaster 38: 38mm, built for smaller wrists.
A genuine 40mm Speedmaster will be a '57, a Racing, or a similar line, and the reference number will say so. If a listing shows a Moonwatch dial with "40mm" in the title, the case and dial came from different sources.
Why Replica Sellers Use the 40mm Label
Replica makers build cases in bulk and reuse them across dial designs. One 40mm case can host a Speedmaster dial, a Datejust dial, or a chronograph layout with minimal retooling. That is why the same seller may ship a 40mm Speedmaster with different subdial positions from one batch to the next.
How to Spot a Fake 40mm Speedmaster
Five areas expose most copies: subdial layout, movement type, case finishing, caseback engraving, and the bracelet. Check them in that order.
1. Subdial Layout and Spacing
The genuine Moonwatch runs a hand-wound movement with subdials at 3, 6, and 9, set close to the center. Many fakes use a Valjoux 7750 style automatic with subdials at 12, 6, and 9, which spreads the layout and often adds a date window. A date on a Moonwatch dial is wrong on its own, since the Professional has no date.
2. Movement Type
Wind the watch by hand. A Moonwatch is hand-wound, so the crown turns with steady resistance and no rotor noise. A replica that spins a rotor when you shake it, or that ticks once per second from a quartz module, is not a Moonwatch movement. Pusher feel matters too: a real chronograph starts and resets with a firm click, not a soft push.
3. Case Finishing
Genuine Speedmaster cases have sharp lug edges, tight bevels, and a polished and brushed contrast you can read from an arm's length. Fake 40mm cases show rounded edges, wider lug gaps, and a bezel insert that sits above the case line. Run a fingernail along the lug: if it catches on a rough edge, the case never saw Omega finishing.
4. Caseback Engraving
Moonwatch casebacks carry deep, crisp text such as "FLIGHT-QUALIFIED BY NASA FOR ALL MANNED SPACE MISSIONS" along with the seahorse medallion. Copies use shallow stamps with uneven black fill, and the letter spacing drifts around the curve. A sapphire display back on a Moonwatch should show a decorated movement, not a bare metal plate.
5. Bracelet and Clasp
Real Speedmaster bracelets use solid end links that sit flush against the case with no rattle. Fake bracelets often use hollow links, a light clasp with a stamped logo, and pins that work loose within weeks. Compare the weight in your hand: a steel Moonwatch on a full bracelet feels dense.
What Do Fake Speedmaster 40mm Watches Cost?
Asking prices for these copies cluster into three bands. Entry listings sit near $60 to $120 and use quartz or a basic automatic. Mid-range copies run $150 to $350 and add a 7750 style chronograph. Higher-priced replicas above $400 sometimes use cloned movements and better cases, but the dial spacing and finish checks still apply. Treat these as market asking prices, not official figures.
Buyer Checklist Before You Pay
- Measure the case with calipers if you can. A listed 40mm that measures 42mm tells you the seller is loose with specs.
- Match the subdial positions to the movement the seller claims.
- Ask for an angled photo of the caseback text, where shallow engraving shows.
- Look for a date window on a no-date model.
- Compare the reference number on the caseback and the papers. Genuine numbers match across both.
Fake Speedmaster 40mm: Common Questions
Is a 40mm Speedmaster real?
Some are. The Speedmaster '57 and several Racing references sit near 40mm, and the Reduced measures about 39mm. A 40mm Moonwatch Professional is not a real Omega product.
Can a fake Speedmaster use a real Omega movement?
Almost never in this price range. Some high-end copies use cloned movements that copy the layout of an Omega caliber. Even then, case and dial finishing give the watch away, and service parts are hard to source.
Why do fake Speedmasters often have a date?
Because the automatic chronograph movement inside most copies comes with a date wheel, and the maker leaves the window open instead of masking it. Genuine Moonwatch Professionals have no date, so any date on a Moonwatch dial is a mismatch.
Should I buy a 40mm Speedmaster replica?
Counterfeit watches carry legal risk at borders, resale problems later, and movements that are hard to repair. If you want a 40mm chronograph, genuine Speedmaster '57 models, mid-size automatics, and many non-Omega chronos fill that slot. Buy the watch you can service.