I G E N E R A L I N F O R M A T I O N; M A N U A L A N D S E L F - W I N D I N G M E C H A N I Ca L Watc H E S; P R I N C I Pa L Wat C H F U N Ct I O N S A N D C O M P L I Cat I O N S - Baume And Mercier 8050 User Manual

I G E N E R A L I N F O R M A T I O N
A . M A N U A L A N D S E L F - W I N D I N G
M E C H A N I CA L WAT C H E S
WATCH PRECISION
A mechanical movement, whether manual or au-
tomatic (self-winding), is a complex assembly of
gears, gear trains and other components often not
much bigger than a single strand of hair.
A watch's precision is determined by the spiral bal-
ance wheel, the heart of the watch, which regulates
the rate of time through its oscillations.
Oscillation frequency varies depending on the mod-
el and can be anywhere between 2.5 and 4 Hz.
It is important to keep in mind that despite careful
maintenance of the movement and the watch itself,
rate variations may still occur. This is mostly caused
by a variety of factors including impact, the aging of
the oils, significant temperature fluctuations, mag-
netic fields and wearer activity.
In general and depending on the model, your watch
time may vary by 1 to 2 minutes per week.
B . P R I N C I PA L WATC H F U N C T I O N S
A N D C O M P L I C AT I O N S
POWER RESERVE
A hand indicates how much of the watch's power
supply remains (for both self-winding and hand-
wound watches).
DUAL TIME FUNCTION
A watch equipped with a dual time complication is
able to indicate a "2nd time zone". This second time
can be read on a central hand or a hand located in a
graduated dial.
CHRONOGRAPH
A chronograph is a watch which can measure
a period of elapsed time. A chronograph model
generally also contains a central seconds-hand
for counting seconds, a counter for totaling mi-
nutes and another for totaling hours.
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