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Jacob & Co. · OI110.21.AA.AC.A

Oil Pump 43MM Black Titanium, Green (Arabic Numerals)

The escapement in slow motion

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Jacob & Co. Oil Pump 43MM Black Titanium, Green (Arabic Numerals) OI110.21.AA.AC.A
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