Seiko Y450-4040 Watch Guide The Seiko Y450-4040 is a watch model based on the Y450 movement.Other models with the same movementY450-0050Y450-4000Y450-4010Y450-4020Y450-4030Y450-4050Y450-4060Y450-4070Y450-4090Y450-4100Y450-4110Y450-4130Y450-4150Y450-4170Y450-4200Y450-4210Y450-4220Y450-4230Y450-4240Y450-4270Y450-4280Y450-4290Y450-4300Y450-4310Y450-4320Y450-4330