Case: Round in 18k white gold, case band engraved with a musical stave. Diameter: 48mm. Caseback personalized for Only Watch 2011 and engraved “piece unique”.
Dial: Rotating hand-guilloche dial featuring a child’s hand outstretched toward that of an adult appearing on the flange. Individually numbered and signed Breguet. The dial center makes a complete turn when the striking mechanism is activated. The mechanism plays the tune A Castle in the Sky. Chapter ring with Roman numerals on the flange. Breguet “hollow moon-tip” hands in blued steel. Alarm on/off indication in a circular window between 9 and 10 o’clock. Alarm power reserve visible through an aperture at 3 o’clock.
Movement: Mechanical self-winding, numbered and bearing the Breguet signature. 55 hour power reserve. Caliber 0900, 17 1/3 lignes, 59 jewels. Silicon escape wheel and lever. Breguet balance with adjusting screws. Breguet balance spring. Frequency 4 Hz, adjusted in 6 positions.