There is also an automatic version of the Due, which, like the hand-wound model, comes in both a red gold and a steel model, though as you’ll see there’s a bigger difference between the two here, than between the hand-wound models. The automatic version is the Luminor Due 3 Days Automatic, and it’s a bit larger, at 45 mm in diameter, and marginally thicker, at 10.7 mm, but it’s still quite slim for a Luminor. Below is the steel model, PAM 000674, which houses Panerai’s micro-rotor caliber P.4000; this is a 13 3/4 ligne, 3.95 mm thick movement. Like the hand-wound P1000, it features a balance bridge securing the balance at two points, for better shock resistance, as well as a three-day power reserve and a frequency of 28,000 vph.