Seiko 4R57-00A0 Watch Guide The Seiko 4R57-00A0 is a watch model based on the 4R57 movement.Caliber 4R57Other models with the same movement4R57-00B04R57-00C04R57-00D04R57-00E04R57-00H04R57-00J04R57-00M04R57-00N04R57-00T0