A Fifty Fathoms GMT comparison comes down to four checks: case thickness, GMT hand setting behavior, bezel action and dial print. The genuine Blancpain Fifty Fathoms GMT pairs a 300 m dive case with a second time zone and a long power reserve, while super clone versions match the silhouette but usually run a modified ETA-style movement with a shorter reserve and a slightly thicker case.
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What does a Fifty Fathoms GMT add to the standard Fifty Fathoms?
The GMT version adds a 24 hour hand and a 24 hour track so a second time zone reads at a glance. Blancpain launched the Fifty Fathoms in 1953 as one of the first purpose built dive watches, built around a rotating bezel for timing dives.
Fifty Fathoms GMT Replica: What to Inspect Before You Buy
The GMT keeps that dive core and adds traveler functionality. Most references stay in the 40 mm to 45 mm range with sapphire crystals, screw down crowns and a unidirectional or bidirectional bezel depending on the model year.
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How do genuine and super clone Fifty Fathoms GMT watches compare on paper?
- Movement: genuine in-house caliber with roughly 100 to 120 hours of reserve; clone builds typically use a modified 2836 or 2824 base with about 38 to 42 hours.
- Case thickness: genuine sits near 13 mm to 14 mm on most references; clones often add 0.5 mm to 1.5 mm because of the GMT module.
- GMT setting: genuine jumps the local hour hand in one hour steps without hacking the seconds; many clones set the 24 hour hand with a separate crown position instead.
- Caseback: genuine shows a gold rotor and decorated bridges; clones show plated brass or steel with shallow engraving.
- Bezel feel: genuine has a firm, click-free or finely ratcheted action; clones tend to feel loose or over-lubricated.
Why is case thickness the first thing to compare?
Thickness changes how the watch sits on the wrist and how the case flanks catch light. A clone with a stacked GMT module pushes the caseback lower and lifts the mid-case profile, which is visible from the side even at arm's length.
Measure with a caliper at the crystal edge and again at the caseback dome. Anything beyond a 1 mm gap from the published reference spec is a clear tell.
How does the GMT complication differ between the two?
On the genuine caliber, the local hour hand advances and retreats in one hour jumps while the movement keeps running, a layout travelers set at the airport. On many clones the 24 hour hand is adjusted by its own crown position, so the local hour hand stays fixed to the minute hand.
Test it: pull the crown to the time-setting position and turn. If the 24 hour hand moves alone, you are looking at a slave GMT module rather than a true jumping hour setup.
Which details give a replica away fastest?
- Dial print: genuine text is crisp and slightly raised; clones show soft edges and uneven spacing between lines.
- Date window: genuine has a clean bevel; clones cut a flat aperture with a mismatched date font.
- Bezel insert: genuine markers are filled evenly with lume; clones show pooling or off-center pips.
- Crown and guards: genuine crown threads engage smoothly; clones often feel gritty within a few turns.
- Lugs and bevels: genuine polishing is sharp and consistent; clones round off the lug tips.
How should you compare two Fifty Fathoms GMT variants side by side?
- Photograph both under the same light at 12 inches and at 6 inches.
- Measure case diameter, thickness, lug width and lug-to-lug with calipers.
- Time the power reserve by winding fully and checking after 24 and 40 hours.
- Run the GMT hand through a full 24 hour cycle and note any stutter.
- Check bezel alignment at 12 o'clock against the dial triangle.
How does the Fifty Fathoms GMT compare with other luxury GMT divers?
The Rolex GMT-Master II offers 40 mm and 100 m water resistance with a true jumping hour hand. The Omega Seamaster Planet Ocean GMT goes deeper at 600 m but adds bulk. The Fifty Fathoms GMT sits between them with 300 m rating, a dive bezel and a cleaner dial layout.
Is a super clone Fifty Fathoms GMT waterproof?
Treat it as splash resistant only. Gaskets on replica cases are rarely tested to the rated depth, so have any clone pressure tested before swimming with it.
Does the 24 hour hand work on every clone?
It moves on nearly all of them, but the setting logic differs. Confirm whether the hand is independent or slaved to the crown before you buy.
Do replicas carry a manufacturer warranty?
No. Replica watches are copies and are not covered by Blancpain service or warranty, so any servicing comes from an independent watchmaker.