Radiomir Chrono This line may well be the flagship watch of Panerai. It was designed and manufactured in 1938 for the Italian Navy. The new and improved Radiomir Chrono line has automatic mechanical movement using Panerai’s own OP XII calibre. As with other Panerai products, the Radiomir is a certified chronometer (C.O.S.C) with a 46-hour power reserve. The chronograph has two counters at 2 and 4 o’clock plus a tachymeter. Its polished 45mm casing has a removable wire loop strap attachment and cushion case which makes the Radiomir a sought-after watch.