Grand Seiko Hi Beat 36000 6145 8000 1960sThe 61GS family featured higher alterations and were called Automatic Hi Beat. These watches came out in the late 1960s and had the Seiko 6100 movement at 21,000 bph. There were 36,000 watches produced for two models(6145 xxxx 6146 xxxx), in line with the 36,000 bph engineering in the movement. This watch has a very standard dial design with a silver dial. Warranty Completely serviced by our watchmaker in February 2020. The plexiglass crystal is