Seiko SPB105 Manuel D'instructions page 3

CAL. 6R15
CHARACTERISTICS OF A MECHANICAL
WATCH
(self-winding type, automatic winding type)
● This mechanical watch operates using power obtained from a mainspring.
● If the watch is completely stopped, manually turn the crown approximately 0
times to wind up the mainspring to start the watch.
● While loss/gain of a quartz watch is indicated by a monthly or annual rate, ac-
curacy of a mechanical watch is normally indicated by a daily rate (loss/gain per
day).
● Normal usage accuracy of a mechanical watch varies according to conditions of
use (time period that the watch is worn on the wrist, temperature environment,
hand movement, and winding state of the mainspring).
● When the watch is affected by strong magnetism, it temporarily gains or loses
time. If the watch encounters a strong magnetic field, the parts of the watch may
be magnetized. In this case, repairs such as removal of magnetism are required.

NAMES OF THE PARTS
Hour hand
Second hand
CROWN
a) Normal position : winding up the mainspring (manual operation)
b) First click position : date setting
c) Second click position : time setting
Minute hand
Date
CROWN
6
a b c
5