Seiko_vintage_VN on Instagram: “Sold out Seiko Superior - Twin Quartz 9983 - 8000 Patina dial very nice original condition #Seiko #Superior9983 #Seikosuperior9983…”
Seiko Superior Twin Quartz 9983-7000 | WatchCharts
Twin Quartz: A Seiko Grand Quartz 9943-8000 from June 1978 | Adventures in Amateur Watch Fettling