Bell & Ross BR MINUTEUR TOURBILLON Technical Notes Download Page 3

DISMANTLING THE STRAP AND ITS TWO FASTENERS

Your watch comprises three assemblies:
Assembly 1: the main body of the case
Assembly 2: the bezel, a sort of “cover” for the case
Assembly 3: the two strap fasteners (K)
Two types of screw are used to assemble the three:
The four split-head screws (G) fix the cover to the case body and ensure that the watch 
is water-resistant. 

Caution

: loosening these screws will automatically invalidate the 

Bell & Ross warranty.
The four hollow-head screws (L) (hexagon slot/1.3 mm in diameter) attach the strap to 
the fasteners (K). These screws may be handled with care by using the two appropriate 
tools supplied with the watch in its presentation case.

IMPORTANT

Water-resistance

. Once the time has been set, push the crown back to position 0.

The crown should never be manipulated under water.

MAINTENANCE

It is advisable to rinse the watch and its strap carefully in fresh water after every immer-
sion in sea water. It is also advisable to have the water-resistance of your watch checked 
every two years. To guarantee service in compliance with brand requirements, any work 
on your watch must be carried out by the Bell & Ross repair centre or a Bell & Ross-
approved watchmaker. You should present the Bell & Ross warranty card, duly dated and 
signed by the retailer when the watch was purchased, for any work within the warranty 
period.

A. 

Minute hand

B. 

Hour hand

C. 

Power reserve indicator

D. 

Timer hour hand

E. 

Timer push-piece

F. 

Timer minute hand

G. 

Bezel fixing screws

 

(NEVER LOOSEN)

H. 

Small second

I. 

Tourbillon carriage

J. 

Crown

K. 

Strap fastener or part fixing the strap to the case

L. 

Screws fixing the strap to its fastener (K)

M. 

Access screw to crown dismantling push-piece 

 

(NEVER LOOSEN)

0. 

Wind the mechanism manually (clockwise)

1. 

Set the time (clockwise or anti-clockwise)

P1. 

Pressing push-piece E initially triggers the timing operation

P2.  

Pressing again activates the timer reset.

 

 Comment

: the timer appears to be stopped after resetting.  

Hand F can only be seen moving after timing for two minutes

2. 

Loosen the four screws (L) to dismantle the strap 

 (anti-clockwise)

GENERAL DESCRIPTION

Movement

: mechanical, manual winding with tourbillon rotating once a minute. 

41 rubies. 21,600 vibrations/hour. 

Functions

: hour, minute and second indication. Power 

reserve indicator (72 hours - 3 days). Timer counting the hours and minutes from a chosen 
moment (two possible measuring scales for the minute hand: one with sixty graduations 
to measure the minutes and one with ten sectors to measure the 10

ths

 of an hour (see 

diagram below). A button (E) resets the timer. 

Case

: 44 mm x 50 mm. Anti-reflective sap-

phire caseback and 

crystal

Water-resistance

: 50 m.

GENERAL USE

Activation

. Crown in position 0. With the watch stopped, wind the mechanism by turning 

the crown clockwise. The power reserve (C) increases in proportion to the winding. It 
indicates the number of running days remaining. 

Caution

: we advise you to stop winding 

the movement before the power reserve hand reaches the “top” (or maximum) gradua-
tion. This will prevent any risk of damaging the mechanism whilst optimising the accuracy 
of the watch. 

Setting the time

. Pull the crown to position 1. Set the time by turning the 

crown in the desired direction.

USING THE TIMER

 

(hours, minutes and 10

ths

 of an hour)

The timer (or chronograph with two central hands) is used to measure a short time 
from a chosen moment.

Pressing initially (P1) on push-piece E at moment T triggers the timing operation. The 
minute hand (F) indicates the minutes timed from moment T on the large, 60-division 
graduation. The hour hand (D) indicates the hours timed on the same graduation. A spe-
cial graduation broken down into ten sectors (at the centre of the timer) indicates, with 
the minute hand (F), the 10

ths

 of an hour. This original graduation is used in certain profes-

sions which count the hours on a decimal scale (see diagram below). Pressing again (P2) 
activates the timer reset. 

Comment

: the timer appears to be stopped after resetting. 

Hand F can only be seen moving after timing for two minutes. This difference corresponds 
to the mechanism’s precision tolerance.

45

50

55

l5

05

l0

60

30

25

40

35

20

l

2

l0

9

8

6

7

5

4

3

(x2)

C

A

B

(x2)

D

F

E

(x4)

H

I

0 1

2

(x4)

P1-P2

 M 

(x1)

BR XT -  TOURBILLON - R - GOLD - LIMITED EDITION 01/30

WATER-RESISTANT 50 M - SWISS MADE 750

V

READING THE TIMER (ExAMPLE)

l

2

l0

9

8

6

7

5

4

3

45

50

55

l5

05

l0

60

30

25

40

35

20

D

F

The hour hand (D) indicates 11 o’clock  
on the large, 60-division graduation.

The minute hand (F) indicates 9 minutes  
on the large graduation or 0.2 hours on the 
decimal scale in the central graduation.

BR MINUTEUR TOURBILLON

Te c h n i c a l   N o t e s

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

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