iwc PORTUGIESER PERPETUAL CALENDAR TOURBILLON Operating Instructions Manual page 17

M O O N P H A S E D I S P L AY
1
Your watch features a moon phase
display, which, with the help of a trans­
mission, displays the time from one
full moon to the next with 28 days,
12 hours and 44 minutes as precisely
as possible. The moon phase display
advances in whole­day increments
together with the calendar. As a full
P O R T U G I E S E R P E R P E T U A L C A L E N D A R T O U R B I L L O N
— 1 7 —
2
Full moon
1 —
Waning moon
2 —
New moon
3 —
Waxing moon
4 —
3 4