This Luminor Submersible 1950 model from Panerai watches is presented in a 47mm titanium case and is equipped with an automatic calibre - P.9100 - to keep the flyback chronograph functions, the hours, minutes, small seconds, date, calculation of immersion time, and seconds, reset in perfect synch for 72 hours. Panerai was a top Italian military secret until a couple of decades ago and is today one of the most desirable watch brands thanks to its military-inspired, rugged, oversized and powerfully luminous men's watches marked by outstanding Italian design and Swiss movements. The Luminor watch was Panerai's second professional military dive watch made in 1950, and distinguished itself from the Radiomir watch by its large crown-protecting bridge with a lever to increase its waterproof properties. Naturally the Luminor Submersible is water-resistant to 300 metres and glows in the dark with Grade A non-toxic SuperLumiNova applications. For fanatics of Panerai's history, the caseback is engraved with frogmen commandos astride their sumbersible torpedo.