Automatic Chronographs; Overviews - RAIDILLON 55 Instrucciones De Uso

1.6 AUTOMATIC CHRONOGRAPHS

1.6.1 Overviews

The first chronograph was invented by watchmaker Louis Moinet in 1816. The
name is derived from the Greek word "chronos", which means "time". Mainly
used for sports activities, it is also favoured in the field of aviation and for scientific
experiments.
The central second hand displays seconds with quarter-second accuracy.
• A counter located at 12 o'clock adds up minutes until 30.
• A second counter located at 6 o'clock adds up hours until 12.
• Where applicable, a third counter located at 9 o'clock displays the small second.
• Where applicable, day and date windows are located at 3 o'clock.
Chronograph
second hand
30-minute counter
Hour hand
Small second
12-hour counter
Tachymetric
scale
Minute hand
On/off pushbutton
– Engaging and release
of the
chronograph's hand
and counters
4-position
crown
Day and date
window
Chronograph
hand and counter
reset
pushbutton
Use:
• Press the A pushbutton : the
chronograph starts,
• Press the A pushbutton : the
chronograph stops,
• Press the B pushbutton : reset.
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