Seiko 5R66 Manual - Page 17

English SPECIFICATIONS 1 Features 5R66:Hour hand, Minute hand, Second hand, 24-hour hand, Calendar display, Power Reserve Indicator 5R67:Hour hand, Minute hand, Second hand, Moon phase display, Power Reserve Indicator 2 Frequency of crystal oscillator ........ 32,768 Hz (Hz = Hertz ... Cycles per second) 3 Loss/gain Within 15 seconds per month (equivalent to 1 second per day) (If the watch is worn on your wrist within normal temperature range between 5 ºC and 35 ºC.) 4 Operational temperature range ....... -10 ºC ~ +60 ºC Under a low-temperature condition (below 0 ºC), always keep at least one-sixth of the watch power shown by the power reserve indicator. 5 Driving system Spring Drive (Automatic type with manual winding function) 6 Hand movement Glide-motion second hand 7 Continuous operating time Approx. 72 hours (Approx. 3 days) *If the power reserve indicator shows the power supplied by the mainspring is full before starting the watch. 8 IC (Integrated Circuit Oscillator, frequency divider, and spring drive control circuit ( CMOS-IC: 1 piece) 9 Jewels 30 jewels * The specifications are subject to change without prior notice for product improvements. 32