Citizen Promaster Dive Automatic Black Dial Polyurethane Strap Watch, 44mm

* Mechanical (8204) Powered by the release of a wound spring, mechanical movements never require a battery. Wound 2 ways: Automatic: Automatic mechanical movements have an oscillating weight that winds the spring with the motion of the wearer’s arm. Manual: The springs on manual-wind mechanical movements are wound clockwise by the rotation of the crown. * Sapphire Crystal Superior scratch resistance and hardness * Mechanical (8204) Powered by the release of a wound spring, mechanical movements never require a battery. Wound 2 ways: Automatic: Automatic mechanical movements have an oscillating weight that winds the spring with the motion of the wearer’s arm. Manual: The springs on manual-wind mechanical movements are wound clockwise by the rotation of the crown. * Sapphire Crystal Superior scratch resistance and hardness