Seiko Caliber A904 No technical information found for this movement.Watches with the A904 movementA904-4000A904-400AA904-4010A904-5000A904-5009A904-5010A904-5019A904-5020A904-5030A904-5040A904-5049A904-5050A904-5060A904-506AA904-506BA904-5070A904-507AA904-507BA904-5080A904-5090A904-509AA904-5100A904-5110A904-5130A904-5140A904-5150A904-515AA904-5160A904-5170A904-5180A904-5190A904-5199A904-5200A904-6000A904-6010A904-601A