Technical Notes; General Use; Important - Bell & Ross Aviation BR01-94 Notice Technique

aviation BR 01-94
Te c h n i c a l N o t e s
GEnERal DEScRiPtion
Self-winding mechanical movement. Meticulous finish. 37 jewels. 28,800 vibrations an hour.
Power reserve : approximately 40 hours. High precision adjustment in 4 positions (tolerance
of 0/+10 seconds a day). Functions: hours, minutes, seconds. 3-counter chronograph (12-
hour, 30-minute and 60-second counters). Date with quick correction. Hour setting with sec-
onds stopped. XL case. Diameter 46 mm. Thickness 10,5 mm. Anti-reflective sapphire crystal.
Waterproof to 100 meters (325 feet).

GEnERal USE

To unscrew the crown in position 0, turn it anticlockwise. In service. When the watch has
stopped , unscrew and pull the crown to position 1 then wind the mechanism by turning the
crown clockwise. After approximately 40 rotations, the watch is completely wound (the mecha-
nism does not have a stopper to avoid too much pressure on the winder). The power reserve
is then approximately 42 hours. When the watch is worn , it is the automatism which winds the
movement. Date setting: Quick setting * (crown in position 2): pull the crown to position 2
and adjust the date by turning the crown anticlockwise. Slow setting : (crown in position 3): in
order to ensure a date change at midnight and not at midday, it is advisable to carry out the date
setting with the help of the hour hands. Pull the crown to position 3 and turn the hands until the
date has changed. Then adjust the hour accurately. Hour setting. Unscrew and pull the crown
to position 3. The second hand has thus stopped which enables an adjustment with accuracy to
within one second. Adjust the hour by turning the crown in the desired direction.
USE oF tHE cHRonoGRaPH
The measurement is carried out in hours, minutes and seconds. Measurement of a short
time. Button H. 1st pressure: sets off the time measurement. 2nd pressure: stops the time
measurement. 3rd pressure: restarts the time measurement. This allows one or several time
intervals to be subtracted from the total time measured or to accumulate the measurement of
several short times. Button J (to use only when the chronograph has stopped). Single pres-
sure: resets the chronograph to zero.
A
B
(x4)
C
D
E
F
(x4)
G
A. Minute hand
B. Mechanism attachment screw
C. Hour hand
D. Chronograph 30 minute totalisator
E. Chronograph second hand
F. Case attachment screw
(NEvER uNsCREW)
G. Chronograph 12 hour totalisator
H. Date
I.
Strap fastener or strap attachment piece on the case
J. Button J
K. Crown
L. Button L
M. Strap attachment screw on its fastener
N. Fastener attachment screw on the case
O. Screw to access button for disassembling the crown
0. Unscrew the crown (anticlockwise)
1. Hand wind the mechanism (clockwise)
2. Set the date (anticlockwise)
3. Set the hour (clockwise or opposite direction)
4. Unscrew the 4 screws (M) to dismantle the strap (anticlockwise)
5. Unscrew the 4 screws (N) to dismantle the strap fasteners (I) (anticlockwise)
L
0 1 2 3
K
J
I
H
(NEvER uNsCREW)
REMovinG tHE StRaP anD itS 2 FaStEninGS
Your watch's case is made up of 3 main sets:
Set 1: the main body of the case with the crown (K)
Set 2: the « lid » of the case with the sapphire crystal
Set 3: the strap's 2 fasteners (I)
These 3 sets are put together with 2 types of screws visible on each side of the case:
The 4 screws (F) with a split head are used to fix the lid onto the body of the case and to ensure
the watch is waterproof (Warning: to benefit from the Bell & Ross guarantee, these
screws must never be unscrewed).
The 8 socket-head screws (M and N) (Allen screw/1.3 mm diameter) are used to fix the strap
onto the fasteners and also the strap's fasteners onto the case. These screws can be handled
with care by using the 2 appropriate tools delivered with the watch in its box.

iMPoRtant

*Quick date setting. As for all mechanical watches equipped with a calendar, the quick date
setting (crown in position 2) MUST UNDER NO CIRCUMSTANCES be carried out between 9 P .M.
and 3 A.M.
Water resistance. Once the setting finished, screw the crown back again in order to guar-
antee perfect water resistance. For this, push the crown to position 0 by turning clockwise
simultaneously. The crown must never be handled under water.
MaintEnancE
It is advisable to rinse the watch and its strap carefully with fresh water after contact with sea
water. It is also recommended that the water resistance of your watch is serviced every two
years. In order to guarantee a service that conforms to the brand's requirements, any inter-
vention on your watch must be carried out by the Bell & Ross repair centre or a watch maker
authorised by Bell & Ross. When a repair is carried out during the guarantee period, you must
present the Bell & Ross guarantee card, duly dated and signed by the retailer at the time the
watch was purchased.
4
M
(x4)
N
(x4)
O
(x1)
The Bell & Ross international guarantee
Your Bell & Ross watch has successfully passed the most rigorous reliability tests in the Swiss watch-making
industry. It is guaranteed against all manufacturing defects for 2 years from the date of purchase entered by the
Bell & Ross approved retailer on the international guarantee certificate subject to applicable laws and/or legal
guarantees. This guarantee is total (parts and labor). It excludes however:
. Damage that is the result of accidents or improper or incorrect use of the watch (violent shock, crushing,
brutal handling of the clasp).
. Damage that is the result of repairs or dismantling not carried out by an approved Bell & Ross retailer or an
approved after-sales service center.
. The results of normal use and wear of the watch and strap. This also excludes batteries given the specific
nature of these items.
IMPORTANT : To be covered by the Bell & Ross International Guarantee, any work must be carried out by
approved specialists : retailers approved by Bell & Ross, approved after-sales service centers.
This guarantee can only be applied on presentation of the Bell & Ross International Guarantee certificate, duly
completed, dated and signed by an approved retailer.
Models and Technical features subject to change
5