@panerai . #radiomir #3days #acciaio : #pam687 #pam000687 In the late 1930s, Panerai made a number of #Radiomir #watches with a special 12-sided bezel, engraved with the words “OFFICINE PANERAI – BREVETTATO”. This inscription referred to the patented luminous substance Radiomir used on the dial, and it suggests that the watches were used not for military operations but for presenting to the authorities of the Royal Italian Navy, which was evaluating new instruments for underwater missions. The Special Edition Radiomir 3 Days Acciaio reproduces all the fundamental characteristics of these vintage watches, respecting their identity and giving collectors the opportunity to appreciate a fascinating chapter in the Panerai story. Remarkably simple and minimalist, with the sandwich structure which maximises the legibility of the large figures and markers, the dial is shaded brown, a completely new colour in the Panerai collections, which evokes the lightening effect which the Radiomir, the luminous substance based on radium, had on the original black dials. On the back of the case, a large porthole with its sapphire window reveals the P.3000 hand-wound mechanical movement, completely created in the Panerai Manufacture in Neuchâtel. The Radiomir 3 Days Acciaio is water-resistant to 3 bar (a depth of about 30 metres). Inside the elegant wooden box in which the watch is presented is a second Plexiglas® crystal, the certificate personalised with the serial number of the Edition, and a rare publication describing the military equipment of the special forces of the Royal Italian Navy, in which Panerai watches and instruments appear.