Hamilton Khaki Aviation Converter Auto Chrono Men's Watch H76726130
100% AUTHENTIC W/BOX & PAPERS. SWISS MADE, AUTOMATIC H-21 VALJOUX 7750 BASE MOVEMENT, STAINLESS STEEL BRACELET, EXHIBITION CASE BACK AND SAPPHIRE CRYSTAL. PLEASE FEEL TO CONTACT ME WITH ANY QUESTIONS OR CONCERNS. Caliber : H-21-Si (ETA Valjoux 7750 Base). Water Resistance : 10 bar (100m)/145 psi (328ft). The H-21-Si is an automatic chronograph movement featuring a state-of-the-art balance spring made from the anti-magnetic material silicon for enhanced resistance to extreme atmospheric conditions. With an extended 60-hour power reserve, this powerful caliber reliably keeps and measures time via two or three sub dials at 6, 9 and/or 12 o'clock, and start/stop and reset pushers on the side.