Bulova 11 Technical Letter

BOOK NO. 63, 11, 448R, 544, 497, 552, 600
SETTING NON-DATE MODELS
IN POSITION
OUT POSITION
desired minute marker; then, gently turn back to the same minute marker.
Step 3: When the time standard by which you are setting your watch
reaches the 60th second, push the crown to the "IN" position without
turning. All hands will start instantly.
SETTING DATE AND DAY/DATE MODELS
IN POSITION
OUT POSITION
INTERMEDIATE
POSITION
Step 3: For AM time, continue to move the hands forward until the minute
hand is approximately 5 minutes ahead of the desired minute marker; then,
gently turn back to the same minute marker. For PM time, follow the same
procedure, but first advance the hands past 12 o'clock.
Note: The date will advance automatically at midnight, provided that AM
and PM have been established (steps 2 and 3). The watch calendar is
programmed for a 31-day cycle. Therefore, on the first day of any month
following a month with less than 31 days, the date must be advanced
manually (see Step 5).
Step 4: When the time standard by which you are setting your watch
reaches the 60th second, push the crown all the way to the "IN" position
without turning. All hands will start instantly.
Step 5: Pull the crown to the "INTERMEDIATE" position (one "click"). Your
watch will continue to tell time. Slowly turn crown one way until correct date
appears. Then, for day/date models, slowly turn crown the other way until
correct day appears.
Note: The day is printed in two successive positions on the day indicator: in
English and in Spanish on U.S. models; in English and in French,
depending on the models. It is possible to make use of either position. The
display will automatically remain in the language chosen. In some models,
the calendar cannot be changed manually between 9:00pm and 6:00am.
However, the mechanism will not be damaged if the crown is turned
accidentally during this period of time.
If the watch has no second hand, merely
pull out the crown and proceed to step 2.
Step 1: When the second hand reaches
the 60th second mark, pull the crown to
the "OUT" position. All hands will stop.
Step 2: Turn the hands forward
(clockwise) to set the time. In order to
prevent the hands from jumping when
the crown is pushed in, set the minute hand
approximately 5 minutes ahead of the
Step 1: When the second hand reaches
the 60th second mark, pull the crown
all the way to the "OUT" position
(you will hear two tiny "click" sounds).
All hands will stop.
Step 2: With the crown still in the "OUT"
position, move hands forward (clockwise)
until you see the date (for date only) or both
day and date change. This establishes
midnight.
Step 6: Push the crown to the "IN" position. Your watch is now
operating normally.
HOW TO USE THE ELAPSED TIME INDICATOR
General
diver has been under water.
SCREW-DOWN CROWN
If your watch includes a screw-down crown, you have additional assurance
that it will remain watertight. To make the crown operational, it must be
turned toward you until the threads are disengaged. Then, instructions for
setting must be followed. To reseal the crown, press in until threads
engage. Turn away from you until tight.
IMPORTANT: Unless the crown is properly resealed, it
will not be watertight.
IF YOUR NEW WATCH IS A MECHANICAL WATCH (no battery)
Mechanical watches differ from Quartz watches in several respects:
1. No battery changes are needed - they are powered by a mainspring,
which is wound either by wrist movement; or in some models by daily
winding of the setting crown.
2. Because it is a mechanical device, its accuracy is subject to
the effects of gravity and temperature. You can expect, on the
average, a daily variance of up to 10 to 20 seconds for mechanical
watches.
3. Just like automobiles, these watches require routine maintenance.
Due to their mechanical complexity, mechanical watches require cleaning
and new lubrication every 3 to 5 years to run at optimum efficiency.
FOR THE AUTOMATIC SELF-WINDING MECHANICAL WATCH.
It must be wound at least six or seven times before you wear it. After that,
your daily activity should wind the watch sufficiently to keep it running at
night when it is not being worn. If your normal daily activity is not sufficient,
occasional supplementary manual winding may be necessary.
It is suggested that your mechanical watch be cleaned and oiled
periodically to insure optimum performance. As a mechanical watch, quartz
watch accuracy cannot be expected. References to the power cell do not
apply to Automatic watches.
FOR MODELS WITH A 24 HOUR HAND
Some models feature a second, adjustable hour hand, at the center of the
dial, that points to a 24 hour indicator ring. This hand can be adjusted to
point to any hour on the scale of 24. It can be used as a Time Zone hand.
TO ADJUST THE 24 HOUR HAND:
Step 1. Pull the crown out to the intermediate position.
Step 2. Turn the crown in the direction opposite from the date setting
direction, until the 24 hour hand is in the desired position. Then, push
the crown in to the normal position.
Watch Setting Guide
If your watch is equipped with a rotatable outer dial
with oneminute graduations, this can be used in
various ways to check elapsed time. For example
if a diver has a 30-minute air supply, he can set the
outer ring so that the triangle is in line with the minute
hand when he submerges. The minute hand will then
indicate on the outer ring the length of time that the
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4/2007