seiko sportsmatic

A Seiko Sportsmatic 5 from 1963. seiko g757 sports 100 1963 also saw the introduction of a second generation Grand Seiko, the manually wound, 35 jewel 43999 self-certified Chronometer This short-lived caliber 430-powered watch was produced for two years only and was the last use of a low beat 18,000bph movement by the Suwa factory for a Grand Seiko