If you've ever used a Marathon watch, you'll likely know about the brand's secret trump card. Unlike most other watches in the modern age, Marathon makes use of tritium tubes for its indices, which glow with radioactivity to help users tell the time in the dark.
It's something which has made these military-approved watches a hit for years, and acts as a quirky point of interest for anyone seeking to single the brand out from a very competitive crowd. And for those applications where Marathon can't use a radioactive material, it turns to a proprietary formula called MaraGlo.
