Everything worth seeing is smaller than you think.
We make movements, and repair the ones nobody else will touch. The one below is running on your clock — the same gear ratios a Swiss going train has used for a century.
A mechanical watch is a machine that loses a second a day and is considered excellent for it. Everything in it exists to make one small wheel turn at exactly the wrong speed, very consistently.
Restoration
Complete services, and the ones that need a part made because the part has not existed since 1954.
Calibres
Three in-house movements, all hand-finished — anglage, côtes, perlage — on surfaces the owner will never see.
Regulation
Adjusted in five positions over fourteen days. A watch that keeps time on a bench is not a watch that keeps time on a wrist.
Calibre A—21
Not a picture of a movement. The wheels below are generated from tooth counts and a pressure angle, meshed at their true pitch radii, and turned by your system clock. Zoom in far enough and the bridge is engraved.
Specification — the going train in numbers
| Wheel | Teeth | Pinion | One turn in |
|---|---|---|---|
| Barrel | 72 | — | 6 hours |
| Centre | 80 | 12 | 1 hour |
| Third | 75 | 10 | 7 min 30 s |
| Fourth | 80 | 10 | 1 minute |
| Escape | 15 | 5 | 3.75 seconds |
| Balance | — | — | 4 Hz · 28,800 A/h |
6 × 8 × 7.5 = 360, so one barrel turn is six hours and the minute hand comes out at one turn per hour exactly.
Three movements
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Ancre 21
Time only, small seconds. The one on this page.
- 21
- 4 Hz
- 72 h
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Ancre 33
Annual calendar. Four correctors, no pushers on the case.
- 33
- 3 Hz
- 65 h
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Ancre 8 Jours
Two barrels in series. Eight days, and the last one keeps time.
- 29
- 2.5 Hz
- 192 h
Four hands, one loupe
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The cage
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Setting a wheel
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Twenty-one jewels
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Disassembled