A replica Speedmaster Pro is a copy of the Omega Speedmaster Professional Moonwatch, and the honest answer is that quality splits into three tiers: quartz junk under $70, mid-tier hand-wound chronographs around $100 to $200, and high-end clones at $300 and up. Nearly every replica runs a Seagull ST19 hand-wound chronograph, because that movement copies the same Lemania 1873 layout Omega used for the calibre 1861. Nothing on the market copies the modern calibre 3861, so any listing that claims it is inflating. Buy the tier, not the story.
Know the real watch first
You cannot judge a copy without the numbers in your head. The Moonwatch is 42mm across, 20mm between the lugs, and about 13mm thick. The dial has three subdials at 3, 6 and 9. Running seconds sit at 9, the 30-minute counter at 3, the 12-hour counter at 6. There is no date. The classic 3570.50 has a solid caseback with the seahorse medallion. The crystal is either hesalite (plastic, domed, warmer in person) or sapphire on the sapphire sandwich references. Older bezels carry the dot over 90, the current 3861 moved the dot next to 90. Small details, but they are how anyone spots a fake in two seconds.
The three tiers
Quartz tier, $20 to $70
Quartz movement, and often the subdials are decorative rather than functional. The chrono seconds hand ticks instead of sweeping. Case size wanders between 40mm and 44mm, thickness often pushes past 14.5mm, the glass is mineral, and the clasp is stamped pot metal. Fine as a beater you do not care about. Not fine at $150.
Mid tier, $100 to $200
This is where you get a real mechanical chronograph on an ST19, a sweeping chrono hand, a screw-down caseback and sometimes sapphire. Case proportions are usually off by a millimeter or two in one direction. The bezel insert font is the giveaway, and the lume is weak enough that you notice on the first dark walk.
High-end clones, $300 to $600
Correct 42mm case, 20mm lugs, 13mm to 14mm thickness, a bezel insert with the right numeral weight, useful anti-reflective coating, and a bracelet with solid end links that does not rattle. Caseback engraving is readable at arm's length instead of looking sandblasted. The movement is still an ST19 with cosmetic finishing. Accuracy runs about 10 to 20 seconds a day out of the box. Expect to service it at some point, and expect a watchmaker to hesitate before taking the job.
What to check before you pay
- Subdial layout: 3-6-9 with running seconds at 9. A 6-9-12 arrangement is a dead giveaway and common on quartz models.
- Thickness: anything over 14.5mm reads wrong on the wrist and will not sit under a cuff.
- Bezel: tachymeter font weight and where the dot sits relative to 90. Fat or blurry numerals are the fastest tell.
- Hands and dial: baton hands, no date window, no automatic text printed anywhere.
- Caseback: how the seahorse and the lettering are cut. Shallow laser etching signals mid tier.
- Movement photos: ask for a picture of the actual movement going into your watch. If the seller will not send one, walk away.
- Crystal: hesalite should have a slight dome and a soft edge. Flat, glassy-clear plastic is a cheap tell.
US legal and practical reality
Counterfeit watches are illegal to import and to sell in the United States. Customs seizes shipments, and when a package disappears there is no recourse and no refund. Beyond that: no warranty, no service network, no resale value, and a trusted dealer list is worth about as much as the forum thread it came from. That last point matters more than any spec sheet, because a clone with a seized shipment is a clone you paid for and never held.
Quick verdict
If you want the Moonwatch look on a budget and you accept the risks, a mid-tier ST19 model is the only tier worth the money, and only if the subdials work and the case measures close to 42mm. If you want a 42mm manual-wind chronograph with a warranty and a service path, a legitimate homage brand gets you there for high-end clone money. Same wrist presence, none of the customs paperwork.