Patek Philippe Caliber R TO 27 QR SID LU clock CL

Description for Patek Philippe Caliber R TO 27 QR SID LU clock CL PATEK PHILIPPE Caliber R TO 27 QR SID LU clock CL
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
hands
9 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)
case diameter: 42.8 mm