Patek Philippe sky moon Tourbillon

Mechanical manually wound movement
Caliber R TO 27 QR SID LU CL
Minute repeater with tourbillon escapement
Chime with two “cathedral“ gongs activated by a slide piece in the case

Front side: Perpetual calendar with retrograde date hand
Hours and minutes of mean solar time
Day, month, leap year by hands
Moon age
Crown at 4 o’clock: setting of the time and winding
Opaline-white dial with embossed Calatrava cross motif, gold applied Roman numerals
9 hands

Reverse side: sidereal time, sky chart, phase and orbit of the Moon
Crown at 8 o’clock (24-hour scale): correction of sky/moon indications
Case is humidity and dust protected only (not water resistant)
White gold

Case diameter: 42.8 mm
C.O.S.C. certificate