Panerai, LUMINOR 1950 series, model: PAM00423, manual mechanical, AISI316L polished stainless steel, case diameter: 47mm, 21 gemstone bearings, double mainspring barrel provides 72 hours (3 days) power reserve, 21,600 frequency; Fully self-produced and polished, with brushed plywood and blue steel screws, the back is transparent and highly ornamental. The winding damping feels heavy and has a sense of ceremony.