The replica Fifty Fathoms Bathyscaphe 5200 is a 1:1 copy of Blancpain's 43.6mm flyback chronograph, typically built with a stainless steel case, ceramic bezel insert, domed sapphire crystal, and a Chinese clone of the F385 automatic movement. Buyers pick it for the vintage-leaning Bathyscaphe dial and the tri-compax layout that the original made famous. Quality varies widely, so the specs below decide whether a build feels close to the real watch.
What Defines the Genuine Bathyscaphe 5200?
Reference 5200 is the chronograph version of the Bathyscaphe line, which Blancpain revived in 2013 as a modern take on its 1956 dive watch. The case measures 43.6mm across and roughly 14mm thick, with a 23mm lug width. Inside sits the in-house F385 caliber, a 5 Hz automatic flyback chronograph with a vertical clutch.
Which Movement Powers a Replica 5200?
Most replicas run a modified Asia Valjoux 7750, or a dedicated clone with a flyback module stacked on top of the base caliber. Budget builds often skip the flyback function and use a standard tri-compax layout instead. Ask the seller whether the flyback resets with a single pusher press, since that test separates tier-one builds from entry-level ones.
Case, Bezel, and Crystal Details to Check
- Case: 43.6mm diameter, roughly 14mm thick, 23mm lug width on the genuine piece.
- Bezel: ceramic insert with filled markings, crisp 60-minute scale, no misalignment at 12 o'clock.
- Crystal: domed sapphire with inner anti-reflective coating, which gives the dial its deep near-black look.
- Case back: sapphire display back showing the rotor and balance, often the weakest point on cheap replicas.
Dial and Handset Checks
The Bathyscaphe dial uses broad lume-filled hands and applied rectangular indexes in a matte gray or black finish. On a strong replica the lume sits level with no overflow onto the dial surface. Solid matte finishes copy better than sunburst or gradient dials, which are harder to reproduce without a washed-out look.
Does Water Resistance Match the Original?
No. The genuine 300-meter rating comes from pressure testing every case, and mass-market replica production does not perform that step. Most replicas handle hand washing and rain but should never go swimming or diving. If you need real water resistance, have a watchmaker pressure test the case and replace the gaskets first.
How to Judge Replica Quality Tiers
- Movement: a working clone flyback beats a standard 7750 with decorative pushers.
- Finish: brushed case flanks with polished bevels, matching the original's mixed finish.
- Bezel action: 120 clicks, firm, with no back play.
- Dial printing: sharp text at macro distance, correct font weight and spacing.
- Lume: even color under UV light, no patches or bubbles.
Frequently Asked Questions
Is the replica 5200 the same size as the original?
Good replicas stay close to 43.6mm across, though budget versions often run a millimeter or two off. Confirm measurements before buying.
Can a replica 5200 take a genuine strap?
Yes, provided the lug width matches the 23mm standard, most OEM and aftermarket Bathyscaphe straps fit. Check the spring bar holes for correct depth.
How much should a quality replica cost?
Tier-one builds with a working flyback movement usually land in the mid hundreds of US dollars, while budget versions sit far lower. Price alone is not a reliable quality signal, so compare specs and photos side by side.