Seiko 4J27 - Manual (Page 10)

English
10
■ CHEMICALS
■ PRECAUTION REGARDING
CASE BACK PROTECTIVE FILM
1 Frequency of crystal oscillator ................ 32,768 Hz (Hz = Hertz ... Cycles per second)
2 Loss/gain (monthly rate) ......................... Less than 15 seconds at normal temperature
range (5
°
C ~ 35
°
C) (41
°
F ~ 95
°
F)
3 Operational temperature range .............. –10
°
C ~ +60
°
C (14
°
F ~ 140
°
F)
4 Driving system ....................................... Step motor
5 Battery .................................................... SEIKO SR621SW, 1 piece (Cal. 2A27)
SEIKO SR521SW, 1 piece (Cal. 4J27)
SEIKO SR43SW, 1 piece (Cal. 7C17)
6 IC (Integrated Circuit) ............................. C-MOS-IC, 1 piece
* The specifications are subject to change without prior notice for product improvement.
SPECIFICATIONS
Be careful not to expose the
watch to solvents (e.g., alcohol
and gasoline), mercury (i.e., from
a b r o k e n t h e r m o m e t e r ) ,
If your watch has a protective
film and/or a sticker on the case
back, be sure to peel them off
b e f o r e u s i n g y o u r w a t c h .
Otherwise, perspiration getting in under
them may rust the case back.
cosmetic spray, detergents, adhesives or
paints. Otherwise, the case, bracelet, etc.
may become discolored, deteriorated or
damaged.