Audemars Piguet 2908 Instructions For Use Manual - page 10
Manual is about: jules audemars watch with ap escapement
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Dual balance-spring
The calibre 2908 also stands out for its totally new
regulator component. Two balance-springs positioned
one on top of the other, offset by 180°, automatically
compensate for any balancing defects.
Undoubted advantages
The system of dual “opposing” flat balance-springs
has many advantages :
no more balance-spr ing “end cur ves” pio-
neered by Breguet and Phillips, which require
painstaking construction, and thus the end
to defects caused by the slight asymmetric
balance-spring development.
automatic compensation for any balance-spring
balancing defects, thus improving accuracy.
prevents errors caused by the watch’s vertical
position.
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