The Wristwatch Field Guide

Isotope Old Radium Polar Enamel

The Isotope Old Radium Polar Enamel is a current-production field watch with a cusn8 bronze case. It is priced well above the $629 median for the category. The caseback is open, so the movement is visible.

Exotic-material field watchesBronzeDisplay backUnder $5,000
Price
$1,200
Material
Bronze
Grade / type
CuSn8 bronze
Water resistance
100 m
Type
Field
Case diameter
40.0 mm
Thickness
10.1 mm
Lug-to-lug
47 mm
Origin
United Kingdom
Movement
Automatic
Caliber
Swiss Landeron automatic (25 jewels, 28,800 A/h)
Power reserve
40 hours
Complications
Date
Construction
Assembled
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
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)
Not published
Reference, Weight, Colour, Hardness, Surface treatment, Matching bracelet
High confidence Verified Jul 2026 Source: Isotope Watches (maker) Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

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Frequently asked questions

What is the case material of the Isotope Old Radium Polar Enamel?

The Isotope Old Radium Polar Enamel has a cusn8 bronze 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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