Arnold & Son Perpetual Moon 39 mm Black Stainless

Case, dial & bracelet

Case dimensions

39 mm

Case thickness

9.4 mm

Case material

Stainless steel

Bezel

Smooth polished

Crystal

Flat sapphire with Cyclops lens

Dial

Black lacquer

Hands

Skeletonised sword hands, white luminescent

Indexes

Diamond-set hour markers

Bracelet / strap

White rubber velcro strap

Clasp / buckle

Triple-folding clasp with safety catch

Water resistance

300 m

Movement

Movement / calibre

Calibre 5D — In-house manual-winding, hand-finished

Movement type

High-frequency automatic

Frequency

28,800 vph (4 Hz)

Power reserve

5 days

Number of jewels

33 jewels

Complications

Minute repeater

Functions

Dive time, running seconds

Watchmaker

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

Production & market

Production period

2001 – 2015

Limited-edition quantity

Not applicable

Current market information

Values have stabilised after the 2022 correction; condition and box-and-papers drive the premium.

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

Arnold & Son Perpetual Moon 39 mm Black Stainless sits within Arnold & Son's Perpetual Moon line, introduced in 2001. It carries the house codes established since 1764 — stainless steel case, black lacquer dial and in-house manual-winding, hand-finished — 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.