Seiko Y800-5070 Watch Guide The Seiko Y800-5070 is a watch model based on the Y800 movement.Parts ListSA2W87LN00crystal010110B01case back gasketOther models with the same movementY800-4000Y800-4010Y800-4020Y800-4030Y800-4160Y800-5000Y800-5010Y800-5020Y800-5030Y800-5040Y800-5050Y800-5060Y800-5080Y800-5090Y800-5100Y800-5110Y800-5120Y800-5130Y800-5140Y800-5150Y800-5160Y800-5170Y800-5220Y800-5230Y800-5240Y800-5250