The Bronze Field Guide

Isotope Old Radium Polar Enamel

The Isotope Old Radium Polar Enamel is a current-production field watch with a cusn8 (tin bronze), maker-stated case. It measures 40.0 mm across, 10.1 mm thick, 47 mm lug to lug, and is water resistant to 100 m. Inside is the Swiss Landeron automatic (25 jewels, 28,800 A/h) automatic movement, with 40 hours power reserve. Complications: Date. Priced from $1,200 (limited edition of 300). Brand origin: United Kingdom.

Bronze field watchesCuSn8FieldDisplay back
Reference
–
Type
Field
Price
$1,200 · limited edition of 300
Case diameter
40.0 mm
Thickness
10.1 mm
Lug-to-lug
47 mm
Water resistance
100 m
Weight
–
Origin
United Kingdom
Movement
Automatic
Caliber
Swiss Landeron automatic (25 jewels, 28,800 A/h)
Power reserve
40 hours
Complications
Date
Ceramic
CuSn8 bronze
Colour
–
Hardness
–
Construction
Assembled
Surface treatment
–
Caseback
Titanium
Nickel-free
Not verified (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
20mm quick-release suede Italian strap with brushed bronze buckle
Ceramic bracelet
–
Crystal
Anti-reflective sapphire
Display back
Yes
Dial
White enamel with Old Radium SuperLumiNova Arabic numerals and black date disc
Dial colours
Black White
Lume
Super-LumiNova (Old Radium)
Availability
Offered
Status
Current (limited edition of 300)
High confidence Verified Jul 2026 Source: Isotope Watches (maker) Maker / listing ↗
Facts are free to cite with a link.
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Frequently asked questions

What bronze alloy is the Isotope Old Radium Polar Enamel?

The Isotope Old Radium Polar Enamel has a cusn8 (tin bronze), maker-stated case with a titanium caseback. This is confirmed against the maker spec.

What size is the Isotope Old Radium Polar Enamel?

It is 40.0 mm in diameter, 10.1 mm thick, 47 mm lug to lug, and water resistant to 100 m.

How much does the Isotope Old Radium Polar Enamel cost, and is it available?

It is current-production and lists from $1,200.

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