Quick answer
Replicas of the Blancpain Fifty Fathoms Bathyscaphe 5200 come from a small group of Chinese factories. Prices run from $220 to $520. None use the genuine Calibre F385. Most use a Seagull ST19 or an Asia Valjoux 7750. Water resistance is not certified. Import into the United States is illegal, and shipments get seized.
Genuine 5200 specs
Blancpain lists ref. 5200-0130-B52A with a 43.6 mm black ceramic case, 14.85 mm thick, and 300 m water resistance. The movement is Calibre F385, automatic, 36,000 vph, 50 hours of power reserve, with a column wheel, vertical clutch, and flyback. The balance spring is silicon. The dial has two registers: a 30-minute counter at 3 o'clock and running seconds at 9. The date sits at 4:30.
What the copies get right
Case diameter lands close to 43 mm. Case shape, crown guards, and lug width match in photos. Sapphire crystal and an anti-reflective coating are standard on the better tiers. The bezel insert is ceramic or ceramic-coated steel.
What the copies get wrong
- Dial layout. A 7750-based copy carries subdials at 12, 6, and 9, not at 3 and 9.
- Date position. Copies place the date at 3 o'clock. The genuine watch places it at 4:30.
- Thickness. Most copies measure 1 mm to 3 mm thicker than 14.85 mm.
- Movement finish. Rotor engraving and bridge bevels do not match Calibre F385.
- Lume. Replica lume dims in under two hours. Super-LumiNova on the genuine watch holds longer.
Water resistance
The genuine 5200 is rated to 300 m under ISO 6425. Replica listings do not test gaskets or caseback torque. Do not swim or dive with a replica chronograph. A pusher seal fails first.
Legal facts for US buyers
19 U.S.C. Section 1307 allows US Customs and Border Protection to seize and destroy counterfeit goods. 18 U.S.C. Section 2320 makes trafficking in counterfeit goods a federal crime with prison terms and fines. A seized parcel means the money is gone and no refund follows.
Price and resale
Replica prices cluster at $220 to $520. Secondary market prices for a genuine 5200 run 40 to 80 times higher. A replica holds no resale value. Most watchmakers refuse to service counterfeit movements, so a broken copy becomes scrap.
How to judge a listing
- Ask for a straight-on dial photo. Count the subdials and check their positions.
- Ask for case thickness measured with calipers.
- Ask which movement sits inside. A stated "clone F385" is not a Blancpain movement.
- Check the date font. The genuine numeral is flat and sans-serif.
- Ask for a photo of the caseback engraving under direct light.