IWC Schaffhausen DA VINCI PERPETUAL Mode D'emploi page 32

1
The moon phase display is automatically set by the calendar so
that it is always correct. The transmission ratio is so precise that
the display deviates by only a single day after 577.5 years.
D A V I N C I P E R P E T U A L C A L E N D A R C H R O N O G R A P H
— 3 2 —
M O O N P H A S E D I S P L A Y
2
Full moon
1 —
Waning moon
2 —
New moon
3 —
Waxing moon
4 —
3 4