- Movement
- Hand-wound
- Size
- 44 mm
Overview
A pebble-shaped case over a skeleton movement
The Jacob & Co. Brilliant Skeleton Northern Lights, reference BS431.40.RD.QR.A, in an 18-carat rose gold case, 44 mm across and 12.10 mm high. It has a red mineral crystal dial and a case pavé set with 251 round diamonds (≈10.25 ct), on a red satin strap with an 18-carat rose gold tang buckle.
This version has an 18-carat rose gold case, a red dial and a red satin strap, and the stones are white diamonds.
Jacob & Co. launched the Brilliant collection in 2017 as a ladies’ line. The case is round, has no lugs and takes the strap directly, and Jacob & Co. likens its shape to a pebble. The Northern Lights series takes its colours from the lights seen near the polar circle.
Hand-wound calibre JCAM01 was developed for this model and is skeletonised. Components that would normally be solid are hollowed out, so the structure of the movement becomes its decoration, and even the Jacob & Co. logo is part of the design. It has 21 jewels and a 46-hour power reserve.
Key details
Design and engineering
- DialRed mineral crystal.
- Gem-settingPavé set with 251 round diamonds (≈10.25 ct), the crown with 30 diamonds (≈0.41 ct) and the clasp with 42 round white diamonds (≈0.54 ct). The total is 323 round white diamonds (≈11.2 ct).
- FinishingAngled bridges with sand-blasted finishing, angled steel elements with drawn finishing, and an open-worked anthracite movement with rhodium-plated gears.
- CaseSapphire crystal with anti-reflective treatment and an engraved edge on the caseback. Water resistant to 30 m.
Calibre JCAM01
- Hand-wound
- 21 jewels
- 46-hour power reserve
- Skeleton calibre
- Hours and minutes
The reference
Technical specifications
| Reference | BS431.40.RD.QR.A |
|---|---|
| Collection | Brilliant |
| Calibre | JCAM01 |
| Calibre type | Skeleton |
| Movement | Hand-wound |
| Functions | Hours & Minutes |
| Power reserve | 46 hours |
| Jewels | 21 |
| Finishing | Angled Bridges with Sand-blasted Finishing, Angled Steel Elements with Drawn-finishing, Open Worked Anthracite Movement with Rhodium-Plated Gears. |
| Case dimensions | 44 mm |
| Case height | 12.10 mm |
| Case material | 18-carat rose gold |
| Crystal | Sapphire with Anti-reflective Treatment |
| Case back | Engraved Edge |
| Water resistance | 30 m |
| Gem-setting | Pave set with 251 Round Diamonds (≈10.25 ct.); Crown with 30 Diamonds (≈0.41 ct.); Clasp set with 42 Round White Diamonds (≈0.54 ct.) |
| Gem-setting: Total carat weight | 323 Round White Diamonds (≈11.2 ct.). |
| Dial | Red Mineral Crystal Dial |
| Hands | Leaf Hands |
| Strap | Red satin |
| Clasp | 18-carat Rose Gold Tang Buckle |
Buying with HYPA
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