Technical specifications: (from the official Patek Philippe web site - all rights reserved)
Patek Philippe Ref. 5146G - Annual Calendar
Caliber: 315 S IRM QA LU
Self-winding mechanical movement, Annual Calendar with moon phase, and power reserve display. GENEVA SEAL
Thickness: 5.22 mm
Power reserve: 48h max
Vibrations per hour: 21'600
Number of parts: 355
21K Yellow Gold Central Rotor
Geneva Seal Hallmark
Dials available in French (F), English (E), German (G) and Italian (I).
Diameter: 30.00 mm
Number of jewels: 36
Power reserve: min 38 max 48 hr
Winding crown with two positions:
- pulled out to set the time
- pushed in to wind the watch
Displays Hours, minutes, seconds subsidiary dials for:
- moon phase (with only 1 day deviation in 122 years)
- day of the week
- power reserve
Apertures: Date at 6 o'clock
Corrector buttons - at 10 o'clock: day-of-week correction
- at 2 o'clock: month correction
- at 4 o'clock: date and month correction
- at 8 o'clock: moon-phase correction
Hallmark Geneva Seal
Case: 18K white gold, yellow gold & platinum
Sapphire crystal front & back and water-resistant crown
Water resistant to 25 meters
Case dimensions Diameter: 39mm
Height: 11.20 mm
Width between lugs: 20 mm
Dial: Lacquered cream or Sunburst slate gray dial for 18K WG & YG
Sunburst slate gray dial for platinum model.
Three Arabic numerals at 3, 9, and 12 o'clock.
Applied baton-style index markers in 18K yellow or white gold.
Feuille (Leaf -shaped) hands in 18K white or yellow gold.
Strap : Hand-made alligator w/ 16-mm folding buckle in YG, WG & Plat.