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Ferdinand Berthoud · FB 1RES.4

Chronomètre FB 1RES

The escapement in slow motion

Light a part
Ferdinand Berthoud Chronomètre FB 1RES FB 1RES.4
18,000 vph, 2.5 Hz, 5 beats a second
Speed

One tick

200 ms, slowed to 20 s11.4 ms of it in the lift
Step through a beat

Escapement, in the lexicon