01 / 03 · Setting
Turn the crown.
The train follows.
One motion at the crown and every wheel answers: hours, minutes and the small seconds move together.
Arc 72 · hand-wound · open-worked
Wind it.It keeps time.
Seventy-two hours of reserve, a balance beating eight times a second, and a movement cut open so you can watch every one of them.
- 40 mmGrade 5 titanium
- 72 hPower reserve
- 4 Hz28,800 vph
Turn the crown.
02 / 03 · Running
Eight beats
every second.
The balance swings 290° and back, releasing the escape wheel one tooth at a time for three days.
03 / 03 · Closer
Nothing hidden.
Nothing idle.
Open-worked bridges, hand-bevelled edges, and a movement you can read like a map.
0 hPower reserve · of 72
Scroll to wind
A fictional watchmaker · not for saleFilm · Google Flow
IIRegulation
A heartbeat,eight a second.
A gold balance and a blue hairspring swing 290° each way; the pallet fork frees one escape tooth per swing. That is all of timekeeping.
Balance · macro00:00 / 00:08
A fictional watchmaker · not for saleFilm · Google Flow
IIITransmission
Five wheels,one ratio.
Barrel to escape wheel, every mesh multiplies the last: the arithmetic that turns three days of spring into seconds.
Going train · macro00:00 / 00:08
A fictional watchmaker · not for saleFilm · Google Flow
IVReserve
Three dayson one wind.
Turn the crown and the barrel at twelve winds nine turns: seventy-two hours, with a long tapered spring that keeps the balance strong almost to the end.
Crown · winding00:00 / 00:08
A fictional watchmaker · not for saleFilm · Google Flow
VSpecifications
Every number,
on the record.
The Arc 72 is a concept. These figures belong to the watch on this page, and the ones in the chapters above are computed from them.
- Case
- Diameter
- 40.0 mm
- Thickness
- 10.8 mm
- Material
- Grade 5 titanium
- Crystal
- Sapphire, both sides
- Water resistance
- 50 m
- Calibre
- Name
- OR-72
- Winding
- Manual
- Frequency
- 4 Hz · 28,800 vph
- Power reserve
- 72 h
- Jewels
- 21
- Components
- 146
- Regulation
- Balance
- Glucydur, 10.0 mm
- Hairspring
- Blued, flat
- Amplitude
- 290–300°
- Rate
- ±2 s/d
- Escapement
- Swiss lever, 20 teeth
- Display
- Indications
- Hours, minutes, small seconds
- Dial
- Open-worked, rhodium grey
- Hands
- Polished, lumed
- Strap
- Material
- Grey calf, oxblood stitch
- Buckle
- Titanium pin