124s Gold Lepine, No. 2010, with minute repeater, perpetual calendar, leap years and moon phases; chronograph with centre 60-minute counter, 1882. The watch was originally created without a chronograph, this was added later by H. Golay.
Audemars Piguet 124b Underdial view
Audemars Piguet 124c Module for the perpetual calendar and phases of the moon display
Audemars Piguet 124d Underdial view with calendar module removed
Audemars Piguet 124e Gilt lever movement, 19¼ bimetallic balance, Breguet balance-spring
