

Last checked Oct 26, 2026
View on Isotope’s site ↗Old Radium Polar Enamel The Old Radium Polar Enamel explores the collection through c ontrast and clarity . Inspired by early pilot and field watches, as well as the instruments used for navigation in extreme environments, this edition focuses on legibility , balance , and permanence . The dial is crafted in white enamel , chosen for its depth , stability , and long-term durability . Unlike painted surfaces, enamel does not fade with time and offers a subtle, mineral-like finish that interacts naturally with light. Against this bright base, the Old Radium numerals and markings stand out with exceptional clarity , reinforcing the functional character of the design . The warm tone of the Super-LumiNova recalls the appearance of vintage radium dials while remaining entirely safe . Sword hands and Arabic numerals follow traditional pilot-watch proportions , ensuring instant readability in all conditions. A discreet date window provides everyday practicality without disturbing the overall balance of the dial . The 40mm case measures just 10.1mm in thickness , giving the watch a notably slim profile for an automatic model . This restrained proportion enhances comfort and wearability while preserving the solid presence expected of a classic tool watch . An anti-reflective sapphire crystal protects the dial, and the open titanium case back reveals the Swiss automatic movement inside. Each watch is individually numbered and produced as a limited edition of 300 pieces . Technical Specifications Brushed CuSn8 Bronze case, sandblasted Titanium exhibition case back. Individual numbering Case diameter 40mm X 47mm (with lugs) Height 10.1mm Anti-reflective crystal sapphire Screw-down crown at 3 o’clock White Enamelled dial with bold Arabic numbers coated with Old Radium SuperLuminova, Date window at 3 o'clock with black date disc Isotope Brushed Bronze Sword hands applied with Old Radium luminescent coating Water-resistance 100m / 10 atm / 330 ft (Light swim rated) 20mm Quick-release Suede Italian strap with bespoke Bronze Brushed Buckle Swiss Landeron Mechanical Movement Automatic, self-winding Power reserve 40 hours 25 Jewels, 28800A/h Accuracy -12/+12 s/day Decorated, Côtes de Genève, perlage Isotope Bronze CuSn8 Care : Bronze, a copper alloy, naturally oxidizes upon contact with oxygen, developing a unique patina over time, enhancing your watch's character. This darkening, known as patina, is a natural process, not a quality concern. However, as bronze is not hypoallergenic, it may cause skin irritation, especially for those allergic to nickel, affecting over 10% of the global population.
Details and photos come from Isotope’s website, last checked Oct 26, 2026. Specs were read automatically and may contain mistakes.
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