A more easygoing version of the Luminor 1950 by Officine Panerai: the 3 Days Acciaio is perfect to be worn at casual occasions or just to go to work. It has a brushed steel case, bezel and guard; it also has a brown calf strap. Size: 47 mm. Bracelet: Calf Ranger, Brown, Ecru. Type of movement: P. 2003 Calibre.