The peerless functionality of the Aerospace has made it a firm favorite among pilots and other great travelers. Its strength lies in the careful choice and organization of its many functions, and particularly in their user-friendly logic. Breitling Professional Aerospace Avantage, Quartz, thermo compensated quartz electronic, analog and 12/24 hr LCD digital display, display backlighting (NVG compatible), EOL indicator. Titanium, 18K red gold case, volcano black dial, aero classic black steel strap, caliber Breitling 79, chronograph 1/100th second, to 59 min.59,99 sec. then hrs/min/sec. to 48hrs max. Digital, day and date programmed for 4 years calendar, water resistance to 100 m (330 ft). Unidirectional ratcheted bezel, sapphire, glareproofed both sides crystal, diameter 42.00 mm, and thickness 10.40 mm.