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Reading time 5 min.

Bremont Supernova Chronograph: A Watch Bound for the Moon

Bremont sends the Supernova Chronograph to the moon — permanently. Here’s a closer look at the launch, the space-mission context, and the technical details of the caliber BC77.
Bremont Supernova Chronograph remains on board Astrolab's FLIP (Flex Lunar Innovation Platform)

Bremont Supernova Chronograph remains on board Astrolab’s FLIP (Flex Lunar Innovation Platform)

© Bremont 

Since the Apollo missions, no timepiece has remained permanently on the moon. That changes this year when Bremont sends its Supernova Chronograph, integrated into the chassis of the Astrolab Rover FLIP, or FLEX Lunar Innovation Platform, for its journey this summer. The watch is supposed to land and remain at the south pole of the moon with Astrobotic's Griffin Mission One. Not a loan appearance, but a permanent artifact on the lunar surface. This is the starting point for a new collection that Bremont connects with a clear strategic calculation: Following the existing universes Supermarine, for sea; Terra Nova, for land; and Altitude, for air, comes Space. The Supernova Chronograph stands at the top of the Bremont hierarchy, both in price and technical execution.

Case and Material Choice 

The 41-millimeter case is made of 904L stainless steel, an alloy chosen by Bremont for its increased corrosion resistance and stronger shine compared to the usual 316L steel. Rolex has relied on the same material for decades, but in sports watches, 904L is not yet a given. The bezel is decagonal and made of black ceramic. Pushers and crown adopt the geometric design language of the case; polygonal surfaces are present there as well. The result is angular without seeming rough, aptly described in the press release as inspired by real and fictional spacecraft. Options include an integrated steel bracelet and a rubber strap with a folding clasp, both with a quick-change mechanism. The case height is 14.4 millimeters, which is quite acceptable for a chronograph with this ambition.

Bremont Supernova Chronograph on the wrist

Bremont Supernova Chronograph on the wrist

© Bremont

The Movement: Bremont Caliber BC77 

Inside works the in-house caliber BC77. It operates at 28,800 vibrations per hour (4 Hz), offers a power reserve of 62 hours, carries chronometer certification, and displays central hours and minutes, as well as a central chronograph seconds hand, a small seconds at 9 o'clock, and a 30-minute counter at 3 o'clock. The date appears at 6 o'clock. The case back reveals the decorated rotor. The base is the Sellita SW510 BH a.

Purchasing base calibers is not uncommon in the watch industry, but it should be put into context: Since 2021, the company has been operating its own manufactory, “The Wing,” in the Chiltern Hills, with around 3,200 square meters of space, where, according to the company, parts of the production and finishing take place.

Bremont Supernova Chronograph, Caliber BC77

Bremont Supernova Chronograph, Caliber BC77

© Bremont

Dial and Legibility 

The dial echoes the geometry of solar panels on spacecraft. A three-dimensional, electroplated grid pattern of black paint with triangular structures lies over a full layer covered with Super-LumiNova, with blue emission. The two sub-dials at 3 and 9 o'clock adopt the same grid pattern. Hands and indices are also luminescent-coated. In practice, this means exceptional legibility in darkness, an argument that makes sense for a tool chronograph concept.

The Lunar Mission in Context 

The fact that Bremont showcased a full-size FLIP Rover alongside this launch is no coincidence. It is the third consecutive year in which the brand has appeared as a main exhibitor at Watches and Wonders Geneva. This signals that Bremont's ambition to belong to the front row of the global watch industry is no longer just an announcement. The cooperation with Astrolab makes thematic sense: Before Supernova or FLIP even fly, both must pass a “Spacecraft Protoflight Qualification,” a multi-stage test program with thermal vacuum tests, sine vibrations, random vibrations, shock tests, and electromagnetic compatibility testing. The principle is “Test Like You Fly,” with test conditions exceeding the actual expected flight conditions. This is a NASA process standard. Additionally, there is a time-historical aspect: The White House in Washington D.C. has tasked NASA with establishing a coordinated lunar time, Coordinated Lunar Time, or LTC, an atomic clock-based time standard for navigation and communication in cis-lunar space, by the end of 2026. The fact that a wristwatch remains permanently on the moon in the same year is a punchline that Bremont does not leave unused.

Bremont Supernova Chronograph with rubber strap

Bremont Supernova Chronograph with rubber strap

© Bremont

The Supernova line distinctly positions Bremont against established sports watch collections with integrated bracelets. The price is around $9,300. Crucial for market relevance will be whether the Supernova is consistently developed further as an independent product line beyond the moon story or remains a singular statement. The announcement of a full collection under the space universe suggests the former.


To learn more, visit Bremont, here.

Technical data

Caliber: BC77, 28,800 A/h (4 Hz), 62 hours power reserve 

Functions: Central hour and minute hands, chronograph central seconds hand, small seconds hand at 9 o'clock, chronograph 30-minute counter at 3 o'clock, date at 6 o'clock 

Case: 904L stainless steel with black ceramic bezel, 41 mm diameter, 48.7 mm case length, 14.4 mm height

Dial: Tachymeter scale on black galvanic dial ring, three-dimensional structured black galvanic dial with full white Superluminova (blue emission)

Glass: Curved, double anti-reflective, scratch-resistant sapphire glass 

Water resistance: 100 meters (10 ATM) 

Bracelet: Quick change system

Bremont Steel Watches Watches & Wonders

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