Inspired by the Model 23, a cutting-edge pocket watch used by U.S. soldiers during WWII, the Khaki Pilot Pioneer's distinctive design is a tribute to Hamilton's aviation and military heritage. The sporty yet refined pilot watch retains an indisputably technical feel with its hand winding mechanical movement, bi-directional rotating bezel and prominent winding crown. The watch features a 43mm bronze case with a black dial and sapphire crystal for protection. The brown calf leather strap secures with a buckle clasp and the watch is water-resistant to 100 meters.