Seiko 5Y01-5000 Watch Guide The Seiko 5Y01-5000 is a watch model based on the 5Y01 movement.Parts ListSADN14JN01crystal35R34NA1crown - crown0H2600N01case back gasket - case back gasketOther models with the same movement5Y01-50105Y01-50205Y01-50305Y01-5040