Seiko 7R68 Manual De Usuario

11

English

1

Main functions ........................................

3 hands (hour, minute and second hands), calendar, and

power reserve indicator

2

Frequency of crystal oscillator ................

32,768 Hz (Hz = Hertz … Cycles per second)

3

Loss/gain (monthly rate) ..........................

Less than 15 seconds at normal temperature range (5

°

 C ~

35

°

 C)  (41

°

 F ~ 95

°

 F) (Corresponding to a daily rate of less

than 1 second)

4

Operational temperature range ...............

–10

°

 C ~ +60

°

 C (14

°

 F ~ 140

°

 F)

* When using the watch in low temperatures, keep the

power reserve indicator above “1/4”.

5

Driving system ........................................

Manual winding mechanism

6

Hand movement system ........................

Sweep-movement second hand

7

Duration of operation ..............................

Approx. 48 hours.  (If the watch is fully wound with the
power reserve indicator pointing to “1”)

8

IC (Integrated Circuit) ..............................

Oscillator, frequency divider and spring drive control circuit

(C-MOS-IC), 1 piece

9

Jewels .....................................................

30 jewels

* The specifications are subject to change without prior notice for product improvement.