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2.5. Where correction of the daily rate is possible,
adjust said rate by means of trimmer, using the key
specially devised for this purpose (fig. 3.2). This key
only must be used in order not to damage the
trimmer. Excess pressure should be avoided during
this operation.
By moving the guide-mark of the trimmer in a
clockwise direction, a gain is obtained; by moving it
in the opposite direction, a loss.
Adjust the watch in relation to the ambient
temperature, according to fig. 4.2.
In order that the temperature of the watch may be
equal to the ambient temperature, it is necessary to
wait about one hour before the measuring is effected.
The values indicated in fig. 4.2. are valid for
a watch with closed back.
Turn the trimmer, bearing in mind a gain of 0.10 to
0.20 sec. as compared with the desired adjustment
according to fig. 4.2, in order to compensate the loss
caused by closing of the case.
2.6. Grease the water-resistance gasket. Close the
case.
2.7. Set the watch and check frequency on
DELTATEST after 24 hours.
Cal. 1310
1973
fig. 3.2
fig. 4.2
5
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