A study of time · No. 31

MECHANICAL

39 mm · Small seconds · 18,000 beats/hour

Watch time · 24 hours00:00:00

32 h power

Drag up to wind

Cycles below are one full revolution at real-time speed. Compound wheels and pinions share a shaft. Setting and winding gears engage through the crown.

Gear	Teeth	Cycle
barrel gear	80	8 h
center pinion	10	1 h
center wheel	80	1 h
third pinion	10	7 min 30 s
third wheel	75	7 min 30 s
fourth pinion	10	60 s
fourth wheel	80	60 s
escape pinion	8	6 s
escape wheel	15	6 s
cannon pinion	8	1 h
minute wheel	32	4 h
minute pinion	10	4 h
hour wheel	30	12 h
setting wheel	12	1 h 30 min
setting idler	15	1 h 52 min 30 s
setting clutch	16	Crown · setting
winding clutch	16	Crown · winding
winding intermediate	14	Crown · winding
barrel ratchet	23	Crown · winding
winding pinion	13	Crown input
bevel wheel	16	16/13 crown turns

The balance completes 2.5 oscillations per second. Each half swing releases half a tooth of the 15-tooth escape wheel.

MECHANICAL

Preparing the movement…