Arnold & Son Luna Magna 40 mm Black Grade

Case, dial & bracelet

Case dimensions

40 mm

Case thickness

11.3 mm

Case material

Grade 5 titanium

Bezel

Fixed brushed titanium

Crystal

Anti-reflective sapphire, double-domed

Dial

Black lacquer

Hands

Rhodium-plated baton hands with luminous fill

Indexes

Applied faceted white-gold indexes

Bracelet / strap

Rubber strap with titanium clasp

Clasp / buckle

Pin buckle in matching case metal

Water resistance

150 m

Movement

Movement / calibre

Calibre 32C — In-house automatic with 22k gold rotor

Movement type

Automatic, self-winding

Frequency

21,600 vph (3 Hz)

Power reserve

38 hours

Number of jewels

21 jewels

Complications

Time and date

Functions

Flying tourbillon, power reserve

Watchmaker

Finishing, assembly and timing are carried out in the manufacture's own atelier.

Production & market

Production period

1991 – 1998

Limited-edition quantity

Not applicable

Current market information

Trades close to retail on the secondary market, with steady demand for full-set examples.

Designer

Jörg Hysek

Jörg Hysek left Rolex and Seiko's European studios to build a design practice in Geneva, giving houses such as Vacheron Constantin, Breguet, Seiko and TAG Heuer their sculptural, architecture-led cases before founding his own brand, HD3.

Historical significance

Arnold & Son Luna Magna 40 mm Black Grade sits within Arnold & Son's Luna Magna line, introduced in 1991. It carries the house codes established since 1764 — grade 5 titanium case, black lacquer dial and in-house automatic with 22k gold rotor — and is one of the references collectors use to date the evolution of the collection.

Interesting facts

• The bracelet tapers across its length, which is why the profile looks thinner on the wrist than the specification suggests.
• Early production dials show a slightly different minute track, and collectors pay a premium for them.