The Polar Worldtimer shows all 24 time zones on a rotating disc viewed from the North Pole, enhanced by a high-domed sapphire crystal that adds depth and a subtle globe effect. The design is crafted through seven hand-applied layers using pad printing, making each dial unique within this limited edition of 300 pieces. Dial & Functions Dial Color : green Functions : World Timer, Central Hour/Minute/Second Case Case Surface : matt Case Back : glass back Material : stainless steel Diameter : 47.5 mm Lug to Lug : 55.5 mm Thickness : 20.0 mm Lug width : 22.0 mm Water Resistance : 3 ATM Glass : sapphire crystal Crystal shape : extra high domed Movement Calibre : ETA 2893-2 Top Grade Movement Type : Automatic Power reserve : 42 hours Number of jewels : 21 Frequency : 28800 bph Shock Protection Finishing : Perlage, Geneva Striping Strap Strap Material : leather Lug width : 22.0 mm Origin: Swiss Made