Blancpain Fifty Fathoms 5100-1140-O52A

Last updated: September 18, 2025
A blue Blancpain Fifty Fathoms 5100-1140-O52A luxury watch with a fabric strap and luminescent hour markers.

Brand: 

Model Line:

Production Period:

2017

Caliber/s:

Case Width:

38mm

Case Height:

44mm

Lug Width:

20mm

Blancpain Fifty Fathoms 5100-1140-O52A Description

The Blancpain Fifty Fathoms Bathyscaphe, reference 5100-1140-O52A, is a key model in the modern Bathyscaphe lineup, which was revived by Blancpain in 2013. The historical context of the Bathyscaphe dates back to the late 1950s as a smaller, more civilian-friendly alternative to the larger, military-focused Fifty Fathoms. This modern reference is significant for capturing that spirit in a contemporary package. It features a versatile 38mm satin-brushed stainless steel case with the Bathyscaphe’s signature sharp, beveled lugs. This specific reference is distinguished by its stunning “Abyss” blue dial and matching blue ceramic bezel insert with Liquidmetal™ hour-markers, offering a rich and dynamic color profile. Unlike the domed sapphire bezel of the main Fifty Fathoms line, the Bathyscaphe uses a flat ceramic insert for a more understated, tool-watch aesthetic. The dial is clean and legible, with simple dot and baton-shaped hour markers and syringe-style hands reminiscent of the original models. Powering the watch is the in-house Caliber 1150, a slim automatic movement known for its impressive 100-hour power reserve, achieved with two barrels, and its silicon balance spring for magnetic resistance. The “O52A” in the reference number indicates it is sold on a blue sailcloth strap with a pin buckle.

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