WATCH GEAR TRAIN CALCULATOR // VPH-HZ
Train
VPH = (Zc × Z3 × Z4 × Ze / z3 × z4 × ze) × 2
Wheels
Center (Zc)
64
Third (Z3)
75
Fourth (Z4)
80
Escape (Ze)
20
Pinions
—
Third (z3)
10
Fourth (z4)
10
Escape (ze)
8
28,800
8.00 Hz
Standard Modern Swiss
ETA 2824-2
Unitas 6498
Valjoux 7750
velocity.calyvent.com