SEIKO One Push Chrono 5717-8990 Crown Chronograph | eBay
Sold at Auction: GENTLEMAN'S VINTAGE SEIKO CHRONOGRAPH MONOPUSHER "OLMPICS"
Seiko Mono-pusher Chronograph 5717-8990 | Wrislabs Store
Seiko 5717-8990 one button chronograph | The Watch Bloke
Seiko One push chrono 5717-8990 Good Accuracy UNUSED NM | eBay
Horology & History on Twitter: "A few watches stand out for their relation to 1964 and the Olympic Games in Tokyo, they are the Seiko World Timer 6217-7000, the Seiko Monopusher Chronographs -
MINT* 1966 Seiko Mono-Pusher Chronograph | Ref. 5717-8990 | Japan Oly - The Time Curator