Khaki Aviation Pilot Pioneer Mechanical Chronograph Stainless Steel / Blue / Bracelet

The Hamilton Khaki Aviation Pilot Pioneer Mechanical Chronograph H76409140 debuted in 2025. This watch has a stainless steel case of 40mm, which houses the hand-wound caliber H-51-Si. The dial is Aviation Blue with a sunburst finish, paired with two counters and Super-LumiNova coated hands and indexes. The H-51-Si movement is based on the Valjoux 7753 architecture, adapted for manual winding and upgraded with a silicon balance spring. It beats at a frequency of 21,600 vph and offers a power reserve of 60 hours. The case is fitted with a sapphire crystal and is water resistant up to 100 meters.