Mineral glass, spherical glass, crew lock back100-meter water resistance case, bezel material: stainless steel, stainless steel bandone-touch 3-fold clasp, world time24 time zones (24 cities)one-time alarm, low battery warning, date display regular time keeping analog: 3 hands (hour, minute, city), 3 dials (world time hour and minute, second, alarm hour and minute)accuracy: ±20 seconds per month approx. battery life: 3 years on sr927w, size of case:  48. 1 × 45. 3 × 12. 5 mm,total weight: 149 g