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640P
Ultra-thin hand-wound mechanical tourbillon movement
22.4 mm
Specific highlights
• The world's thinnest shaped tourbillon movement, 3.5 mm thick
• The flying tourbillon gives the piece an undeniable elegance, with the carriage suspended from a
single axis just above the dial at 12 o'clock.
• The ultra-thin carriage (2.8 mm) weighs only 0.2 g thanks to its three titanium bridges.
• The visual effect produced by the flying tourbillon is accentuated by the presence of the Piaget "P"
initial. The asymmetrical nature of this decorative feature required meticulous development to ensure
the overall balance.
• Tonneau-shaped movement
• Seconds indicated by the fyling tourbillon
• Moon phase indicator at 6 o'clock, lapis lazuli disk with gold moon inlays
• Astronomical moon-phase, only 1-day discrepancy every 122 years
6
28.6 mm
3.5 mm
640P
Ultra-thin hand-wound mechanical tourbillon movement, moon-phase indicator
Functions
Central hours and minutes
Flying tourbillon at 12 o'clock
Seconds indicated by the flying tourbillon at 12 o'clock
Moon phase indicator at 6 o'clock
Finishing
Circular Côtes de Genève
Hand-circular-grained plate and bridges
Hand-bevelled and hand-drawn bridges and carriage
Blued screws on bridges
Jewels:
23
Components:
180
Movement thickness:
3.5 mm
Casing dimensions:
12'''
3/4
x 10''' (28.6 mm x 22.4 mm)
Frequency:
21,600 vibrations/hour, 3 Hz
Power reserve:
approximately 40 hours
7
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