Seiko 4R57 Manual - Page 11

English SPECIFICATIONS 1 Features 4R57 5 hands, time display (Hour, minute and second hands), date display and power reserve indicator 2 Vibrations per hour 21,600 3 Operational temperature range Between -10 ºC and 60 ºC (Between 14 ºF and 140 ºF) 4 Continuous operating time More than approx. 41 hours 5 Driving system Automatic winding type with manual winding mechanism 6 Jewels 29 jewels 7 Magnetic resistance 4,800 A/m (60 gauss) • The specifications are subject to change without prior notice for product improvement. 20