A fake Blancpain Fifty Fathoms is a replica of the Swiss brand's 1953 dive watch that copies the case, dial, and sapphire bezel but not the in-house calibre 1315. Most replicas sell between $80 and $900, run Asian or Swiss-clone movements with 38 to 42 hours of power reserve, and give themselves away through the date window, bezel insert depth, and caseback engraving.
How can you tell a fake Blancpain Fifty Fathoms from a genuine one?
Check the date window first. Blancpain places it between 4 and 5 o'clock on the Fifty Fathoms 5015 and most Bathyscaphe models, and cheap replicas often move it to 3 o'clock because the donor movement's date wheel sits there.
Then study the bezel insert. The genuine sapphire insert has a domed, slightly milky depth with lume glowing from underneath, while replica inserts are usually flat, printed, or mineral glass with dull markers.
- Power reserve: the real calibre 1315 runs 120 hours; a fake stops in about two days.
- Caseback engraving: genuine text is crisp and deep with a defined serial; replicas look shallow or laser-etched.
- Weight and finish: a real 45 mm steel Fifty Fathoms feels heavy with sharp, polished bevels; replicas feel light and rounded.
- Crown action: the genuine screw-down crown turns smoothly with tight threads; counterfeits feel gritty.
- Lume: Super-LumiNova on the genuine glows evenly for hours; replica lume fades fast and often mismatches between dial and bezel.
What are the quality tiers of Fifty Fathoms replicas?
Replica Fifty Fathoms watches fall into three rough price bands, and build quality tracks the movement and case supplier more than the badge.
Entry tier, $80 to $200
Quartz or basic automatic movements, mineral glass, aluminum or printed bezel inserts, and stamped casebacks. These are the easiest to spot in hand and rarely survive contact with water.
Mid tier, $220 to $450
Seiko NH35, Miyota 9015, or ETA 2824 clone movements inside a 316L case with sapphire crystal and decent bezel action. Dial printing improves, but the date font and lume application still miss the original.
High tier, $500 to $900
Decorated clone movements, engraved casebacks, sapphire bezel inserts, and better bracelet finishing. Even here, no replica reproduces the calibre 1315's five-day reserve or Blancpain's silicon balance spring.
Which Fifty Fathoms references get copied most?
The 5015 in steel and titanium leads, followed by the Bathyscaphe 5100, the Barakuda, and the vintage-inspired No Rad and Milspec editions. Older 500 Fathoms and 70th-anniversary pieces appear less often because their cases cost more to machine.
Is a replica Fifty Fathoms waterproof?
Treat any claim of 300 m water resistance as marketing language. Gaskets, crown threads, and caseback seals on replicas vary by batch, so most are safe for splashes only unless a watchmaker pressure-tests them.
What movement is inside a fake Fifty Fathoms?
Common choices include the Seiko NH35, the PT5000, the Hangzhou 6300, and decorated ETA 2824 clones. A few high-end builders add engraved rotors and a power-reserve indicator that does not match the real 120-hour spec.
Frequently asked questions
Do fake Blancpain Fifty Fathoms watches hold value?
No. Replicas lose value the moment they ship and cannot be serviced by Blancpain or sold through authorized channels.
How much does a genuine Fifty Fathoms cost?
New steel Fifty Fathoms models typically list between roughly $15,000 and $20,000, which is exactly why the replica market targets them.