Grand Seiko (Special) Standard Inspection Certificate - Seiko Cal. 9S85 Operating Instructions Manual

Description of Grand Seiko Standard Terminology
Item
5 orientations are specified by the International Standard
ISO3158 so as to carry out various kinds of tests for time
keeping. In addition thereto, in the GS inspection, 12 o'clock
Position in
Up position in the state where a watch taken off the wrist is
inspection
placed, is added, 6 orientations are specified. (Dial Up, Dial
Down, 12 o'clock Up, 3 o'clock Up, 6 o'clock Up, and 9
o'clock Up)
Mean value of a total of 12 daily rates measured in 6 different
positions, respectively, for two days. This is a target value
Mean daily
indicating basic gain/loss per day of a watch, however, it is
rate
required to comprehensively judge the actual accuracy
performance in consideration of other items.
Mean value of a total of 6 variations of daily rates between the
Mean first day and second day when measured in 6 different
variation positions for two days each. It indicates the degree which daily
accuracy stabilizes in each position.
Maximum value of a total of 6 variations of daily rates between
Maximum the first day and second day when measured in 6 different
variation positions for two days each. It indicates the degree which
accuracy per day changes at maximum according to positions.
Indicates gain/loss in two positions at which a watch is most
Difference
frequently used in daily life. It is a difference between mean
between flat
daily rates for two days when a watch is placed in the dial Up
and hanging
position and mean daily rates for two days when a watch is
position
placed in the 6 o'clock Up position.
Greatest
difference
Maximum difference value between daily rates for twelve days
between the
in the test initial stage and mean daily rates. It indicates the
mean daily
degree at which the daily rate varies according to the manner
rate and any
for placing a watch.
individual
rate
Variation in daily rates per 1 ℃ between 38 ℃ and 8 ℃ in the
First variation
same position (Dial Up position). It indicates gain/loss in the
of rate per
temperature environment (taken-off state from the wrist) where
1℃
a watch is used.
Variation of daily rates per 1℃ between 38℃ and 23℃ in the
Second
same position (Dial Up position). It indicates gain/loss in the
variation of
temperature environment (worn state of the wrist) where a
rate per 1℃
watch is used.
Value obtained by subtracting mean daily rates of initial two
Rate- days from daily rate of the last inspection day. It indicates the
resumption degree at which daily rate stabilizes after usage for a
predetermined period.
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Meaning
Grand Seiko Standard Inspection Certificate
○ Grand Seiko Standard Inspeciton Certificate certifies the values of a
movement single unit before assembly in a case which were
measured under an artificially controlled environment in the
manufacturing plant have passed the Grand Seiko Standard
Inspeciton. The certificate is printed with the caliber number,
movement serial number, and case serial number.
○ Normal usage accuracy of mechanical watches varies according to
respective customer conditions of use (winding state of the
mainspring by movement amount of the wrist per day, temperature
environment, and position (orientation of a watch). Accordingly, the
actual normal usage accuracy when it is used by a customer may
differ from the value of each item specified in the Grand Seiko
Standard.
CAUTION
The Grand Seiko Standard Inspeciton Certificate cannot be
reissued when it has been lost. Also, it cannot be reissued
after repair or adjustment.
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