A replica Fifty Fathoms chronograph is a copy of Blancpain's dive watch with a stopwatch function, sold with a third-party movement instead of Blancpain's in-house caliber. Builds run from simple quartz models under $100 to super clones near $600 that match case size, dial layout, and bezel finish. The case measures about 43 mm to 45 mm depending on which Blancpain reference the factory copied.

The real line covers the Fifty Fathoms Chronograph Flyback and the smaller Bathyscaphe Chronograph. Replica listings lean toward the Bathyscaphe case, since the 43 mm size suits more wrists. Both share the same design language: a rotating dive bezel, a screw-down crown, and two chronograph registers on the dial.

What Defines a Replica Fifty Fathoms Chronograph?

Three features tell you what you are looking at. Check them before you compare prices.

• Movement: an automatic chronograph caliber, usually an Asian 7750 clone, or a quartz module on the cheapest builds.
• Case and bezel: stainless steel case with a rotating bezel that should click at fixed intervals, not spin free.
• Dial: two subdials, a date window, and applied markers on the better copies.

Which Movement Powers a Replica Fifty Fathoms Chronograph?

The movement sets reliability, case thickness, and how the subdials sit on the dial. Three options cover most of the market.

Asian 7750 automatic

This is a clone of the Valjoux 7750, and it drives most mid-range and high-end Fifty Fathoms chronograph replicas. It winds itself, runs at 28,800 vibrations per hour, and supports a 12-hour chronograph totalizer. Build quality varies by factory, and a rough example shows a wobbling rotor or a chronograph seconds hand that stutters.

Quartz

Quartz versions cost the least and keep time without winding. The trade-off is a thin case, a dial that looks flat next to the original, and a ticking rather than sweeping hand. These sell as fashion pieces, not as close copies.

Hand-wound chronograph movements

A few builders use the Seagull ST19, a hand-wound column-wheel design. It gives a smooth pusher feel and a case that stays slim, but you wind it every day and spare parts are harder to source.

What Are the Quality Tiers and Prices?

Asking prices track the movement, the case finish, and the dial details. Expect these bands when you shop Chinese replica dealers.

• Budget ($60 to $150): quartz or a low-grade automatic, mineral glass, stamped caseback, loose bezel action.
• Mid tier ($180 to $300): Asian 7750, sapphire crystal, ceramic or sapphire bezel insert, decent lume.
• Super clone ($350 to $600): close case dimensions, correct subdial spacing, engraved caseback, bracelet with solid end links.

Prices swing with shipping, payment method, and what the dealer puts in the box. A warranty card and a printed box add cost and prove nothing about the watch inside.

Which Fifty Fathoms Chronograph References Get Copied?

Factories stick to a handful of references because buyers know them by sight. Model numbers you will see in listings include the 5085F Flyback and the 5200 Bathyscaphe Flyback Chronograph.

• Fifty Fathoms Chronograph Flyback: the larger case, closest to the classic dive chrono look.
• Bathyscaphe Chronograph Flyback: the smaller, dressier option with a ceramic bezel insert on most builds.
• Older reeditions: vintage-styled dials that show up in small batches and vary the most from listing to listing.

Match the replica against photos of the exact reference before you buy. Subdial spacing and date position differ between them, and a rep built on the wrong case fools nobody who knows the line.

How Do You Spot a Poor Replica?

Small details separate a good build from a bad one. Work through this list before you pay.

• Subdial spacing: on the genuine watch the registers sit clear of the date window. Cramped subdials point to a small movement dropped into a big case.
• Date position: many reps place the date at 4:30 when the copied reference had it at 3.
• Bezel insert: sapphire or ceramic on the real thing, painted metal on cheap copies.
• Caseback engraving: laser etching looks shallow and gray, while the original uses deep engraving.
• Lume: charge the watch under a lamp. A weak, patchy glow means cheap paint.
• Bracelet fit: gaps between the case and the first link show up on budget builds.

What Should You Check Before Buying?

1. Ask for photos with the chronograph running, not just a static dial shot.
2. Confirm the movement name and factory version in writing.
3. Request a video of the pushers starting, stopping, and resetting to zero.
4. Check case thickness. A 7750 build sits near 15 mm, so a 12 mm claim means something else is inside.
5. Ask about water resistance and treat the answer as a claim, not a fact.

Frequently Asked Questions

Is a replica Fifty Fathoms chronograph waterproof?

Most are rated for splash and rain at best. Gaskets on budget builds sit loose, and the pushers are the first place water enters. Do not swim or dive with a replica unless a watchmaker has pressure tested it.

How close is a super clone to the genuine watch?

A good super clone matches case size, dial layout, and bezel look. It will not match the movement finishing, the rate stability of a Swiss escapement, or the resale value. Hold one next to a real Blancpain and the gaps show at arm's length.

What does servicing cost?

An Asian 7750 service runs $80 to $150 at an independent watchmaker. Many owners swap a failed movement instead, since a new clone costs less than the labor charge.

Can a chronograph replica be repaired in the US?

Some shops work on Asian 7750 movements. Others refuse replicas outright, so ask before you ship anything anywhere.

Legal and Practical Notes

Selling a watch that carries another company's trademark is illegal in the US, and customs officers can seize shipments. Buying for personal use carries less risk, but the watch still comes with no warranty and no resale market. Treat the purchase as a hobby expense, not an investment.

If you want the Fifty Fathoms look with real support, a microbrand dive chronograph with a Seiko or Sellita movement costs about the same as a super clone and arrives with a valid warranty. Weigh that option before you send money overseas.