Bulova 100 Meter 98U13 Technical Letter

Technical
Letter
BOOK NO. 63, 11, 448R, 544, 497, 552
SETTING NON-DATE MODELS
If the watch has no second hand, merely
pull out the crown and proceed to step 2.
IN POSITION
Step 1:
the 60th second mark, pull the crown to
the "OUT" position. All hands will stop.
Step 2:
(clockwise) to set the time. In order to
OUT POSITION
prevent the hands from jumping when
the crown is pushed in, set the minute hand approximately 5
minutes ahead of the desired minute marker; then, gently turn
back to the same minute marker.
When the time standard by which you are setting your
Step 3:
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
Step 1:
IN POSITION
the 60th second mark, pull the crown
OUT
all the way to the "OUT" position
POSITION
(you will hear two tiny "click"
sounds). All hands will stop.
Step 2:
"OUT" position, move hands forward
INTERMEDIATE
(clockwise) until you see the date
POSITION
(for date only) or both day and date
change. This establishes midnight.
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.
The date will advance automatically at midnight, provided
Note:
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).
When the time standard by which you are setting your
Step 4:
watch reaches the 60th second, push the crown all the way to the
"IN" position without turning. All hands will start instantly.
Pull the crown to the "INTERMEDIATE" position
Step 5:
(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
GENERAL
When the second hand reaches
Turn the hands forward
When the second hand reaches
With the crown still in the
Watch Setting Guide
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 acciden-
tally during this period of time.
Push the crown to the "IN" position. Your watch is now
Step 6:
operating normally.
HOW TO USE THE ELAPSED TIME INDICATOR
If your watch is equipped with a rotatable outer dial with one-
minute graduations, this can be used in vari-
ous 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 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 main-
spring, 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, it's 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 mainte-
nance. 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.
#10828-12/2004