Time, keptby hand
One calibre, finished to the last hidden screw. Twelve watches a year.
- 01 — The face
A silver-grained dial, eleven applied batons and two leaf hands blued in the flame. It shows the time in Besançon, now.
- 02 — Turned over
Through the sapphire back: the Calibre I.01, thirty millimetres across, beating eight times a second.
- 03 — Taken apart
One hundred and forty-one parts on five levels. Every one is finished, including the ones no one will see.
- Balance4 Hz · 28,800 A/h
- HairspringHeat-blued steel
- Jewels21 rubies
- Power reserve72 hours
Chronometry
± 2 seconds
a day
Every Calibre I.01 is regulated in six positions and at 8, 23 and 38 °C before it leaves the bench — the positions and temperatures chronometer trials use.
The escapement
Eight beats
every second
The balance swings out and back four times a second. On every swing the pallet fork lets the escape wheel advance half a tooth, gives the balance a push and locks again. That click is the tick you hear — and between clicks the balance swings free, which is why it keeps time.
Bridges
Finished where
no one looks
Commissions
Twelve watches
a year
Each one is begun only when someone asks for it. Today the wait is about fourteen months.
Begin a commissionQuestions
About fourteen months from the first conversation to the day you collect it in Besançon. Four hundred hours of that are bench time; the rest is waiting for the eleven watches ahead of yours.
Silver grené or slate, printed or left blank, and one line engraved on the caseback ring. The movement and its finishing are never changed: every I.01 is the same calibre.
In six positions and at three temperatures, to within two seconds a day. You receive the timing sheet with the watch, signed by the watchmaker who regulated it.
Every five to seven years, here in Besançon, by the hands that assembled it. Parts are made in the atelier, so no I.01 will ever be unrepairable.