- Movement
- Self-winding
- Size
- 38 or 40 mm
Overview
The five-day Octa
The F.P. Journe Octa Réserve de Marche Black Label in platinum with a blackened gold and whitened guilloché silver dial and blued and rhodium-plated steel hands. Self-winding calibre 1300.3 with off-centre hours and minutes, small seconds at 4:30, large date and power reserve at 7:30; 10.6 mm high.
The Black Label Réserve de Marche pairs a platinum case with a blackened gold and whitened guilloché silver dial and rhodium-plated steel beside the blued hands. F.P. Journe gives its production as 2006 to 2010. The brand created the Black Label collection, when it made about 1000 watches a year, as a platinum, black-dial line available only to owners of an F.P. Journe watch and sold only in its boutiques and Espaces.
The Réserve de Marche is the Octa at its simplest: hours and minutes, small seconds, large date and the reserve indicator. F.P. Journe presents it as a world premiere, in its account the first mechanical movement with automatic winding and a power reserve of over 120 hours, and the first automatic to keep precision timekeeping for five days off the wrist. The brand calls the Octa its most evolved construction, one chassis that takes very different mechanisms without changing size.
Journe's route to the long reserve was the mainspring itself. Adding a wheel to the train would have stretched the running time but left little energy at the balance, forcing a smaller, less stable one; instead he extended the spring's development and laid it on the same level as the gear train and escapement. The low torque lets the rotor wind it quickly: one and a half hours on a Chappuis cyclotest for over 5 days' running, by his figure. The off-centre rotor winds in one direction.
For collectors
The reserve indicator at 7:30 is the reason for the model. F.P. Journe separates the 120 hours it claims for precision timekeeping from a total autonomy of 160 ± 10 hours, so the five days of the brand's claim are not the whole of the running time.
Key details
Design and engineering
- One long mainspringLengthening the spring's development, instead of adding a wheel to the train, keeps enough energy at the balance for it to stay a full-size, stable oscillator across five days.
- One-direction windingThe off-centre rotor winds in one direction. At full wind the mainspring slips in its barrel, so the rotor cannot overwind it.
- Free-sprung balanceFour inertia weights set the rate, with a flat microflamed Anachron spring, a Nivatronic collet laser-welded to it, a mobile stud holder and a pinned stud. In-line lever escapement, 15-tooth wheel.
- Three-position crownPosition 2 sets the date by turning in opposite directions; position 3 sets the time. The date changes instantaneously.
- DialOff-centre hours and minutes, small seconds at 4:30, large date and reserve at 7:30. Blackened gold with whitened guilloché silver;; blued steel hands.
Calibre 1300.3
- Automatic winding, uni-directional, off-centre rotor
- 21,600 vibrations per hour (3 Hz), 37 jewels
- Autonomy 160 ± 10 hours
- Amplitude dial-up 280° at 12 hours, 220° at 90 hours
- 30.80 mm overall diameter, 5.80 mm high, 257 parts
- Circular stripes on the bridges, base plate partly circular-grained, steelwork with polished chamfers
The reference
Technical specifications
| Reference | A |
|---|---|
| Collection | Black Label |
| Calibre | Calibre 1300.3 |
| Movement | Self-winding |
| Functions | Off-centre hours and minutes, Small seconds at 4:30, Large Date, Power-reserve indicator at 7h30 |
| Case dimensions | 38 or 40 mm |
| Case thickness | 10.6 mm |
| Case material | Platinum |
| Dial | blackened Gold and whitened guilloché Silver |
| Hands | blued Steel and rhodium plated Steel |
| Jewels | 37 |
| Power reserve | 160 ± 10 hours |
| Frequency | 21'600 Alt/H, 3Hz |
| Distribution | Black Label collection: available only to owners of an F.P. Journe watch, in F.P. Journe boutiques and Espaces. |
| Status | No longer in the current collection |
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