The movement is Panerai’s manual-wound Caliber P.3000, developed and produced entirely at its manufacture in Neuchatel, Switzerland, which boasts the three-day power reserve that lends the model its name. The movement, visible through the exhibition caseback, achieves its lengthy power reserve by means of two spring barrels in a series. It has wide brush-finished bridges with chamfered edges and a variable inertia balance with an extra-large balance wheel (13.2 mm diameter), oscillating at a frequency of 3 hz. Caliber P.3000 is also equipped with a device that enables the hour hand to be adjusted in jumps of one hour either forward or backward.
The Panerai Radiomir 1940 3 Days Oro Rosso comes on a brown alligator leather strap with a polished rose-gold buckle. Panerai also offers a version in a stainless steel case (PAM00514) and two Radiomir 1940 models in 42-mm cases in steel (PAM00512) or rose gold (PAM00513), containing Panerai Caliber P.999.