Based on the original ALTIP pilots watch, this edition combines a hardened steel case and strap with a highly legible Super-Luminova coated dial. Its stealthy black appearance is also furthered with its smoked crystal exhibition case back and black rotor. Passionate about celebrating British engineering and innovation as part of the testing cycle, Bremont has teamed up with veritable aviation pioneers Gravity Industries, testing the ALT1-P2 beyond endurance in the next frontier of human flight. MOVEMENT Modified calibre 13 ¼"' BE-53AE automatic chronometer, 27 jewels, Glucydur balance, Anachron balance spring, Nivaflex 1 mainspring, 28,800bph, 42 hour power reserve. Bremont moulded and skeletised decorated rotor. FUNCTIONS Hour/Minutes, small seconds counter at 9H. Date at 6H. Chronograph centre sweep seconds hand, 30 minutes counter at 3H. CASE Hardened stainless steel Bremont Trip-Tick® construction with scratch resistant DLC treated case barrel. Case diameter 43mm, lug width 22mm, case thickness 16mm. CASE BACK Stainless steel with integrated flat crystal, 5 stainless steel screws with polished heads. DIAL & HANDS Metal dial, Super-LumiNova® coated numerals and inlaid hands. CRYSTAL Double anti-reflective, scratch resistant sapphire crystal. WATER RESISTANCE Water resistant to 10 ATM, 100 metres. STRAP Black Leather Strap RATINGS & CERTIFICATION Chronometer rated to ISO 3159 standard.