The dial of a watch uses mother-of-pearl surface to display three chronograph counters. Two distinct versions of a watch are adorned with Polynesian mother-of-pearl, black or white according to the variation. The bezel is graced with no less than 66 diamonds, totaling 0.92 carats, while skeleton central hour and minute hands seamlessly flow across the surface. As a final touch, refined aesthetic is completed with a Corum key counterweight on central sweep seconds hand.

The watch uses COSC chronometer-certified mechanical automatic movement Caliber CO984. It offers great diversity of functions: central hours and minutes, sweep seconds hand, small seconds at 3 o’clock, a 30-minute counter at 9 o’clock, a 12-hour counter at 6 o’clock and a date window at 4.30. The movement is built on 37 jewels and offers 42 hours of power reserve.
The Corum Admiral’s Cup Challenger 40 Chrono Diamonds is available in two variations: crafted polished and satin-brushed steel and fitted with a rubber strap, or crafted 18-carat red gold and fitted with a crocodile strap and gem set dial. Both variations are offered in either black or white. The watch offers 50 or 100 meters of water resistance, depending on a version, which is rather disappointing for a sports chrono.

Reference:
984.970.85/0089 PN37 white dial
984.970.85/0081 PN36 black dial
Movement:
- CO984, Self-winding chronograph, COSC certified
- Frequency 4 Hz, 28'800 vibrations/hour
- 37 jewels
- Special Corum finish, including the oscillating weight engraved with the brand name
- Power reserve of 42 hours
- Hours, minutes, small secondes, date
- Chronograph with counters; small seconds at 3 o'clock, 12 hours at 6 o'clock, 30 minutes at 9 o'clock
Case:
- 18kt red gold 5N case with vulcanized rubber bezel, set with 66 diamonds, total : 0.924ct
- 40mm diameter
- Crown in 18kt red gold 5N, engraved with Corum key
- Vulcanized crown protector
- 18kt red gold 5N screwed open back
Dial:
- White or black
- 3 counters with mother-of-pearl
- 12 nautical pennant hour-markers on the flange
- Red gold 5N minute numeral and 8 diamonds
- Red gold 5N facetted hour and minute hands with Superluminova
- Red gold 5Ncounters hands with Superluminova
- Red gold 5N seconds hand counterweight shaped like the Corum key
- Date indication in a window at 4.30 o'clock
Glass: Cambered twelve-sided sapphire crystal with anti-reflective coating
Strap: Genuine black or white crocodile leather, width 21/18mm
Buckle: 18kt red gold 5N tongue buckle with Corum logo
Water resistance: 5 atmospheres (165 feet / 50 meters)











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