Ten years later (1969) and beaten by 0.01mm -- Piaget cal9P vs Seiko cal68. This is industry-history how we like it: significant and comprehensible.

Sure, while the Rolex-Fanboys are boiling-up the debate about the green inverted Ragazzi-Six again, we are pacing through the ages with an eye for the relevant #horologicalMilestones (*klikk): Avanti, Plus Ultra.