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Ferdinand Berthoud · FB 1.2

Chronomètre FB 1

The escapement in slow motion

Light a part
Ferdinand Berthoud Chronomètre FB 1 FB 1.2
21,600 vph, 3 Hz, 6 beats a second
Speed

One tick

167 ms, slowed to 16.7 s9.5 ms of it in the lift
Step through a beat

Escapement, in the lexicon