Some WIS trivia …
Perhaps for the next GTG if the conversation lags.
Question
Who were the makers that produced there own 36,000vph movements?
Answers
Girard-Perregaux (1965)
Longines (1967)
Seiko (1968)
Favre Leuba (1968)
Zodiac (1968)
Movado (1968)
Eberhard (1968)
Eterna (1969)
Zenith (1969)
A. Schild (1970)
Felca (1972)
Citizen (1975)