The replica Fifty Fathoms 1953 5050 is a modern copy of Blancpain's 1953 dive watch, the model many collectors credit as the first purpose-built modern diving wristwatch. A well-made copy reproduces the roughly 41 mm case, the domed crystal, the black dial with large luminous numerals, and the rotating bezel closely. A weak copy gets the proportions and the dial printing wrong, and that gap is what you actually pay for when you move up a tier.

What the 1953 Fifty Fathoms changed

Blancpain launched the Fifty Fathoms in 1953, and the design was shaped by Jean-Jacques Fiechter, the company's head at the time and an active diver. Three features defined it.

  • Water resistance rated to 50 fathoms, roughly 91 meters, which gave the watch its name.
  • A rotating bezel with a locking mechanism, patented, so a diver could time a dive without knocking the bezel out of position.
  • An automatic movement, useful because a diver's hands are busy and manual winding is impractical underwater.

Some early examples also carried a moisture indicator on the dial, a small disc that changed color if water entered the case. That detail appears on a few replica dials and is one of the easiest things to get wrong.

Where the number 5050 comes from

The 5050 number is not a universal factory code that every seller uses the same way. In listings, it usually appears next to "1953" to point at the 50th anniversary and tribute references that revived the original design decades later, plus the reference family around them. When you buy a replica Fifty Fathoms 1953 5050, confirm the specific dimensions and dial layout in the listing photos rather than trusting the number alone. Two sellers can use the same title for watches that differ in case size, bezel insert, and movement.

Specs worth checking before you pay

  • Case diameter: the original sits near 41 mm. Ask the seller to measure the actual watch, not the catalog drawing.
  • Thickness and lug to lug: these decide how it sits on a 6.5 inch wrist. A thick case on a copy often looks bulkier than the real thing.
  • Crystal: sapphire with inner anti-reflective coating is the better option. Mineral glass scratches and looks flat.
  • Bezel insert: steel or aluminum with a printed or engraved scale. Check that the click is firm and aligns at 12.
  • Dial printing: font weight, spacing, and the shape of the numerals. Blurry edges are the first sign of a low tier build.
  • Lume: vintage copies usually use a warm cream tone, later tributes use white. Match the version you actually want.

Replica tiers and what the money buys

Three rough bands exist, and the differences are visible in the hand.

  • Entry: mineral glass, a basic automatic or quartz movement, stamped dial furniture, loose bezel action.
  • Mid: sapphire crystal, a reliable Japanese automatic such as a Miyota or Seiko NH series, a cleaner dial, better case finishing.
  • High tier: a clone automatic movement, correct dial font, thicker lume application, screw-down caseback, sharper brushing and polishing breaks.

A first copy Fifty Fathoms in the mid band is usually the sensible pick for daily wear. The top band makes sense if the dial details matter to you.

Water resistance: the honest answer

ISO 6425 defines the testing a watch must pass to be labelled a diver's watch, and a copy does not go through that process. A replica rated at 50 meters may hold up in a shower and may not. Do not dive or swim laps with one. If the caseback is screw-down and the gaskets are sound, rinsing it in fresh water after contact with salt water is reasonable, then dry it with a soft cloth.

Buyer checklist

  1. Ask for real photos of the exact watch, not renders.
  2. Request measured case diameter, thickness, and lug to lug.
  3. Ask which movement is inside and whether it hacks and hand winds.
  4. Confirm crystal material and whether coating is on the inside.
  5. Ask about bezel alignment at 12 and click feel.
  6. Check the return window and how disputes are handled.

Care and service

Keep the watch away from chlorine and hot water, which dry out gaskets. Wipe the case after wear to remove skin oils that dull the finish. Have the movement serviced every few years if you wear it daily, and store it in a dry box rather than a steamy bathroom. Treat the strap as a wear item, since leather and rubber both age faster than the case.

Quick answer

Buy the replica Fifty Fathoms 1953 5050 for the look and the wrist presence, not for dive duty. Judge it on case dimensions, crystal material, dial printing, and movement, and ignore the number in the listing title.