Seiko Y643-007B Watch Guide The Seiko Y643-007B is a watch model based on the Y643 movement.Other models with the same movementY643-0010Y643-0020Y643-0030Y643-0040Y643-0050Y643-0060Y643-0070Y643-007AY643-0080Y643-0090Y643-0100Y643-0110Y643-0120Y643-0130Y643-0140Y643-0150Y643-0160Y643-0170Y643-0180Y643-0190Y643-0200Y643-0210Y643-0220Y643-0240Y643-0250Y643-0260Y643-026AY643-0270Y643-027AY643-027BY643-0280Y643-0290Y643-0310Y643-0330Y643-0340Y643-0350Y643-0360Y643-0370Y643-5000Y643-5010Y643-5020Y643-502AY643-5030Y643-5040Y643-5050Y643-5060Y643-5070Y643-5080Y643-5100Y643-5110Y643-5120Y643-5130Y643-5140