Jacob & Co. Billionaire 39 mm Slate Platinum

Case, dial & bracelet

Case dimensions

39 mm

Case thickness

8.1 mm

Case material

Platinum 950

Bezel

Octagonal with 8 hexagonal screws

Crystal

Anti-reflective sapphire, double-domed

Dial

Slate grey

Hands

Mercedes hour hand with Chromalight display

Indexes

Applied Arabic numerals with luminous coating

Bracelet / strap

Integrated steel bracelet

Clasp / buckle

Folding clasp in matching case metal

Water resistance

50 m

Movement

Movement / calibre

Calibre 4C — In-house tourbillon, manual-winding

Movement type

Automatic, self-winding

Frequency

21,600 vph (3 Hz)

Power reserve

65 hours

Number of jewels

40 jewels

Complications

Moon phase

Functions

Perpetual calendar, leap year

Watchmaker

The calibre is built in-house and adjusted in five positions before delivery.

Production & market

Production period

2020 – 2025

Limited-edition quantity

Not applicable

Current market information

Thin secondary-market supply — pricing is set piece by piece at auction.

Designer

In-house design studio

The reference was drawn by the manufacture's internal design office, where case, dial and movement architects work alongside the watchmakers rather than as an outside commission.

Historical significance

Jacob & Co. Billionaire 39 mm Slate Platinum sits within Jacob & Co.'s Billionaire line, introduced in 2020. It carries the house codes established since 1986 — platinum 950 case, slate grey dial and in-house tourbillon, manual-winding — and is one of the references collectors use to date the evolution of the collection.

Interesting facts

• Early production dials show a slightly different minute track, and collectors pay a premium for them.
• The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.