Miyota 8N24 Silver Movement,Twin Quartz: A Seiko Grand Quartz 9943-8000 from June 1978 | Adventures in Amateur Watch Fettling,Twin Quartz: A Seiko Grand Quartz 9943-8000 from June 1978 | Adventures in Amateur Watch Fettling,Tendence NO LIMITS,Lab Design,X3H3E73E J05R, Black And Green,50mm,WR100M,St/Stee | eBay,1981 Seiko Grand Quartz HGP 9943-8020