Certina DS-1 Big Date Powermatic 80Certina DS 1 Big Date Powermatic 80 The Certina DS 1 Big Date Powermatic 80 is a timeless and refined timepiece that combines Swiss precision with sophisticated design. Featuring a 41 mm stainless steel case, this watch is designed for durability while maintaining an elegant aesthetic. The grey dial, accented with silver tone hands and indices coated with Super LumiNova, ensures excellent readability in various lighting conditions. The Big Date