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 -
SEIKO One Push Chrono 5717-8990 Crown Chronograph | eBay
The SEIKO Crown chronograph | Draft inventory - CLOCK ME TENDER