Audemars Piguet Calibre 2910 Instructions for use manual - page 11
Manual is about: Calibre 2910
Hand-wound Millenary Minute Repeater with AP Escapement
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Dual balance-spring
The calibre 2910 also stands out for its totally new
regulator component. It has two spirals one on top of
the other offset by 180°.
Undoubted advantages
The system of dual “opposing” flat balance-springs
has many advantages :
no more balance-spring "end curves" pioneered
by Breguet or Phillips, which require painstaking
construction.
automatic compensation for any balance-spring
balancing defects, thus improving accuracy.
prevents errors caused by the watch’s vertical
position.
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