The Radiomir 1940, in both the steel and the red gold versions is also available with the case 42 mm in diameter with the P.999 hand-wound movement, the smallest and thinnest in the wide range of calibres produced by the Officine Panerai manufacture in Neuchâtel.

Visible through the window in the sapphire crystal window which opens on the back, the P.999 has a power reserve of 60 hours and a balance which oscillates at 21,600 alternations/hour (equivalent to 3 Hz). In the red gold version, where the arrises of the bridges are chamfered, smoothed and polished, the active length of the balance spring is adjusted by a swan-neck regulator, while in the steel version it is adjusted by curb pins.

The Radiomir 1940 (PAM00512) and the Radiomir 1940 Oro Rosso (PAM00513) are supplied with a black or brown alligator strap, and they are part of the Historic Collection.

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