Seiko 7B24 User Manual

*Lengthadjustmentserviceformetallicbandsisavailableatthe
retailerfromwhomthewatchwaspurchasedorSEIKOCUSTOMER
SERVICECENTER.
Theservicemayalsobeavailableonachargeablebasisatother
retailers,however,someretailersmaynotundertaketheservice.
ThankyouverymuchforchoosingaSEIKOwatch.
ForproperandsafeuseofyourSEIKOwatch,
pleasereadcarefullytheinstructionsinthis
bookletbeforeusing.
Keepthismanualhandyforeasyreference.

Seiko 7B24 Specifications

Frequency and Timing

frequency of crystal oscillator	32, 768 Hz
loss/gain (monthly rate)	±15 seconds

Operating Environment

operational temperature range	-10℃ to +60℃
normal temperature range	5℃ to 35℃

Power

power source	Secondary battery, 1 piece
duration of operation	Approximately six months
extended operation with power save	Approximately one year and a half