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21
WATER-RESISTANCE / SCREW-IN CROWN AND PUSH-PIECES
Precautions regarding water-resistance
If your watch is water-resistant it is essential that the seals be checked
each year before the bathing season because, without your realising
it, they might have been damaged as the result of a shock.
If the case has to be opened for any reason, the seals for the glass
and the case-back as well as the crown (and/or push-pieces) must
be checked and, if neces-sary, replaced.
Screw-in crown and push-pieces
Certain Longines models have a screw-in crown which has to be
unscrewed before each adjustment by turning it anti-clockwise
( g. ).
After use, return the crown to position 2,
then push in and screw
in rmly in position
1
to ensure that the seal with the case is water-
resistant
( g. ).
Important ! You should always push the
crown (and/or the push-pieces) right in and
screw in firmly to ensure a water-resistant
seal with the case. The crown (and/or push-
pieces) should never be adjusted if the
watch is in a humid atmosphere.
Book_I.indb 66 13.08.19 10:56
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