GrandeVitesse Chronograph 24h (with second time-zone)
Technical specifications
Reference numbers GrandeVitesse Chronograph 24h in stainless steel with tachymeter on the bezel
L3.637.4.50.x
L3.637.4.60.x
L3.637.4.70.x
Calibre Self-winding mechanical movement
Calibre L686 (ETA Valjoux 7754)
13¼ lines, 25 jewels, 28,800 vibrations per hour
Power reserve of 46 hours
Functions Hours, minutes, seconds, date and second time-zone
Chronograph
Centre seconds
30-minute counter at 12 o’clock
12-hour counter at 6 o’clock
Case Round, Æ 44 mm, stainless steel
Black aluminium or brushed stainless steel bezel with double
Mach 2 tachymeter (kph and MPH)
Transparent sapphire glass case back
Dial Black, chocolate brown or silver sun-pattern dials featuring a “large 12” in Arabic numerals and twelve painted hour-markers, 24-hour scale in Arabic numerals on the flange
Date aperture at 3 o’clock
Small seconds at 9 o’clock
Hands Polished, rhodium-plated hands with superluminova coating
Black 24-hour hand with red tip, coated in superluminova
Water-resistant To 50 metres
Crystal Sapphire with anti-reflective coating
Bracelet/strap Stainless steel bracelet with triple folding safety clasp or black or brown leather strap with alcantara lining and folding clasp