The Sumo models have been upgraded with a new movement that provides a 70 hour power reserve. The new automatic 6R35 operates at 21,600 bph and provides a hand wind capability. The crystal has also been upgraded to sapphire. These models are available in a black and a green colour way. Features Case Material: Stainless Steel Movement: 6R35 Jewels: 24 Power Reserve: 70 hours Crystal: Sapphire crystal Bezel: Unidirectional Water resistance: 200m Diameter: 45.0mm 3 YEAR WARRANTY