Hi-Beat 36000 80 Hours SLGH011,Grand Seiko Heritage Hi-Beat Watch, 40mm White Dial, SBGH299,In 2022, Grand Seiko launched its most complicated watch ever, the Kodo Constant Force Tourbillon. Translating from the Japanese word for “heartbeat,” the Kodo made horological history by combining a constant-force mechanism,Hi-Beat 36000 SBGH347,Hi-Beat 36000 80 Hours SLGH011