Graham-London‘s Chronofighter Oversize Diver Turbo Tech & Chronofighter Oversize Diver Deep Black watches are specially designed for serious divers. These watches are resistant to 1000 feet / 330 metres and designed around the needs of the professional diver.
The professional diver usually requires a built-in helium escape valve, which allows for a prolonged deep water trip. When coming up from the depths after days in a diving chamber breathing Trimix or Heliox (a special divers gas for deep water work), this valve will equalise the pressure difference between the trapped gases inside the case and the surface.
Helium, as you may know, is the world’s second smallest molecule, it will inevitably find its way into your watch if you spend some time in a diving chamber. The solution to this is to include a pressure release valve integrated into the 2 o’clock part of the case.
The Super-LumiNova coating on the dial and hands will also help you read time in the dark. Even with diver gloves on, the use of the trigger to activate the stop watch is easy and intuitive. The same goes for the unidirectional rotating bezel for measuring dive and decompression time.
The 47mm diameter case houses Calibre G1734, a self-winding bi-compax chronograph with 48 hours power reserve. The watch is worn on an integrated hypoallergenic black rubber strap.
The Chronofighter Oversize Diver Turbo Tech has a stainless steel case and black dial with yellow contour and white Super Luminova. Dressed in a black PVD steel case, the Chronofighter Oversize Diver Deep Black model uses grey Super LumiNova on the black dial.
2OVEV.B15A : Chronofighter Oversize Diver Turbo Tech
2OVEB.B38A : Chronofighter Oversize Diver Deep Black
Chronograph (seconds, 30 minutes counter)
Date at 7 o’clock
Helium escape valve
Hours, minutes, seconds from the centre
– Central chronograph second hand
– 30 minutes counter at 9 o’clock
– 60 seconds counter at 3 o’clock
Left-hand side fast-action start/stop trigger and reset pusher
Calibre G1734, automatic bi-compax chronograph
Frequency: 28’800 A/h (4 Hz)
Incabloc shock absorber
Power reserve: 48 hours
Steel (2OVEV.B15A) / Steel with black PVD (2OVEB.B38A)
Diameter: 47 mm
Thickness: 17 mm
Steel with black PVD left-hand fast-action start/stop trigger and reset pusher with “Clous de Paris” high grip pattern
Steel with black PVD bezel, rotating rim to measure decompression time
Steel (2OVEV.B15A) / Steel with black PVD (2OVEB.B38A) case back with steel Royal Marine crown-symbol secured by 8 screws
Glass: Domed sapphire crystal with anti-reflective coating on both faces
Water resistance: 1000 feet / 330 metres
Black dial with yellow contour, black minutes counter with silver ring, black and yellow seconds counter with silver ring (2OVEV.B15A)
Black dial and counters (2OVEB.B38A)
2OVEV.B15A: White Super-LumiNova hours, minutes, chronograph seconds hands and indexes. Minutes hand with orange contour, Silver minutes counter hand with Super-LumiNova tip, Black seconds hand with red tip, Silver with white Super-LumiNova chronograph second hand with red tip
2OVEB.B38A: Black nickel hours, minutes hands and indexes with grey Super-LumiNova. Black minutes counter hand, Black seconds hand with red tip, Black skeleton chronograph seconds hands with red tip
Integrated black rubber
Buckle: Pin buckle
Chronofighter Oversize Diver Turbo Tech: 9’300 CHF
Chronofighter Oversize Diver Deep Black: 10’500 CHF