Seiko 2J31 Instructions Manual page 75

Type of watch
(The first four digits of the caliber
number of your watch Ex. 8J41-0AA0)
8J41 8J42
8N51 8N65
9581 9587
7N93 9544
7740 7741 7742 7749
8J55 8J56
○ The battery life shown above is for a watch with a new battery.
○ The battery in the watch at the time of purchase is a monitor battery inserted in the watch at the factory
for performance checks, therefore, the battery may run down earlier than the above-specified period.
○ When the battery is exhausted, the second hand moves at two-second intervals.
○ The accuracy is under the condition that the watch is worn on the wrist in a normal temperature range
between 5 ℃ and 35 ℃.
○ Loss / Gain is determined per year ; i.e., each month does not lose / gain the same number of seconds
(e.g. One month = 2 secs., another month = 1 sec., etc)
○ Operational temperature range is −10℃〜＋60℃ ( 14° F〜140° F ) .
Battery
Battery
（ ）
life
SB-
AJ
AT Approx. 3 years
AJ
AN Approx. 5 years
AJ Approx. 2.5 years
AN Approx. 5 years
Loss/Gain
（ ）
per year
±10 seconds
±20 seconds
±10 seconds
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