Two hundred andeleven parts.One heartbeat.

Fig. I  —  The case, opened

Remove the gold, and what is left is a machine.

AH-01 is a hand-wound skeleton tourbillon: 211 parts and 31 jewels, and not one of them hidden behind a dial. Keep scrolling and we will take it apart, layer by layer, in the order it was put together.

Fig. II  —  Exploded along the axis

Twelve layers. 6.1 millimetres.

Sapphire, hands, chapter ring, bridges, winding works, going train, tourbillon, barrel, mainplate, case. Every wheel here is turning at its true ratio — and the hands are showing your time.

• 32.4 mm calibre
• 31 jewels
• 211 parts

Fig. III  —  Energy

Hold the crown. Feel the ratchet.

Forty-two centimetres of mainspring, coiled in a toothed drum. Each turn of the crown winds it tighter around the arbor while the click stops it slipping back. Thirty turns buy three days.

Press and hold the crown, or the gauge

Fig. IV  —  Transmission

Four wheels turn days into seconds.

The barrel turns once every eight hours. The centre wheel turns once an hour and carries the minute hand. The third wheel steps it up again, until the tourbillon cage turns exactly once a minute.

• 96 : 12 barrel
• 80 : 10 centre
• 75 : 10 third

Fig. V  —  Regulation  ·  shown at ⅒ speed

Eight times a second, it lets go.

The pallet fork unlocks the escape wheel by half a tooth and returns a small push to the balance. The balance swings almost three quarters of a turn each way; its hairspring, thinner than a human hair, keeps the beat. The whole escapement rides in a cage that turns once a minute, averaging out gravity.

• 4 Hz
• 290° amplitude
• 0.29 g cage