**Legendary Italian watches since 1860**
From their ambitious, late-19th Century Italian beginnings to clandestine military operations to their modern day as a 100% Swiss-made luxury horology house, the Panerai brand and the men and women behind it have seen a lot over the years. Through it all, they’ve remained devoted to making dedicated tool watches and pushing the boundaries of technology, materials and design with every timepiece they make.
The Radiomir California 3 Days is a tribute to the 1936 prototype created by Panerai to equip commandos of the Royal Italian Navy. Many of its characteristics are directly descended from the prototype: the cushion-shaped case in steel with a 47 mm diameter, the slender wire strap attachments, the conical crown and the simple dial designed for maximum legibility.