Long Nguyễn Thanh on Instagram: "Seiko 5 Actus 21 jewels automatic, Cal.6306-8040 day date/ case no.694294 , made in Japan. All original parts with good condition. OH already ( serviced ). Price
Seiko 5 Actus SS automatic 23 jewels Ca. 1970s Ref 6106 8400 for $395 for sale from a Seller on Chrono24
Vintage Seiko 5 Actus SS 6106-8680 on eBid United States | 219425427
Ultra Rare SEIKO 5 ACTUS SS Ref. 6106-8410 Vintage Rare Japan - Etsy
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Seiko 5 Actus SS 6106-8670 automatic wristwatch(fully serviced) | eBay
WTS] Seiko 5 Actus SS Green Dial Vintage Automatic Watch - Men 1970-1979 | 6309-8840 in 99$ – WatchPatrol
Seiko Actus SS 6306-8020 from 1986 – Paleh
Seiko Actus 1977 Men Automatic 6306 5001 Japanese 35mm Stainless St Watch KS
Vintage Rare Seiko 5 Actus SS 6106-8440 Automatic Mens Watch | WatchCharts