Arnold & Son Perpetual Moon 39 mm Green Quartz

Case, dial & bracelet

Case dimensions

39 mm

Case thickness

10.2 mm

Case material

Quartz TPT

Bezel

Unidirectional ceramic 60-minute

Crystal

Anti-reflective sapphire, double-domed

Dial

Green sunburst

Hands

Mercedes hour hand with Chromalight display

Indexes

Printed minute track with applied batons

Bracelet / strap

Rubber strap with titanium clasp

Clasp / buckle

Pin buckle in matching case metal

Water resistance

100 m

Movement

Movement / calibre

Calibre 43D — In-house manual-winding, hand-finished

Movement type

Automatic with micro-rotor

Frequency

25,200 vph (3.5 Hz)

Power reserve

38 hours

Number of jewels

45 jewels

Complications

GMT / second time zone

Functions

Chronograph, tachymeter, date

Watchmaker

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

Production & market

Production period

1981 – 1987

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

Arnold & Son Perpetual Moon 39 mm Green Quartz sits within Arnold & Son's Perpetual Moon line, introduced in 1981. It carries the house codes established since 1764 — quartz tpt case, green sunburst 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 movement's bridges are decorated even where they will never be seen once the watch is cased.
• 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.