SPECIFICATIONS 

Brand: Patek Philippe
Model: Annual Calendar
Reference Number: 5035R-001
Movement: Automatic 
Condition: Mint
Gender: Men’s
Time Period: 2003
Box: Yes
Papers: Yes

THE CALIBER
Caliber: 315 S QA 24 H
Jewels: 35

THE CASE
Case Material: 18K rose gold
Case Diameter: 37 mm
Thickness: 11 mm
Waterproof: 80 ft./25 m.
Water Resistance: 2.5 ATM
Material Bezel: Fixed 18K rose gold
Glass: Sapphire crystal
Dial: White opaline
Dial Numerals: Raised 18K rose gold applied Roman numeral hour indices, railway-track minute/second markers around the outer rim

THE BRACELET / STRAP
Bracelet color: Brown
Bracelet Material: Leather
Clasp: Tang
Clasp material: 18K rose gold

THE FUNCTIONS
Annual calendar, hours, minutes, seconds, day sub-dial indicator at 10 o’clock, 24-hour (day/night) indicator at 6 o’clock, date aperture at 6 o’clock, month sub-dial indicator at 2 o’clock 

FURTHER READING

Round-shaped case
18K rose gold with luminous insert leaf-shaped hour/minute hands and sub-dials hands, blackened stick shape center sweep seconds hand
Screw-down sapphire crystal display case back
18K rose gold pull/push crown with Calatrava cross engraving
Original Patek Philippe strap and tang buckle
This automatic caliber 315 movement is rhodium-plated with fausses côtes decoration and the stamp of the Seal of Geneva quality mark. It was constructed with 316 parts and contained a straight-line lever escapement, a shock absorber mechanism, and a 21K gold rotor. The mechanism oscillates at 21, 600 vph (3Hz), and it has a self-compensating free-sprung flat balance spring. The patented Patek Gyromax balance spring compensates for cold, heat, isochronism, and five positions.
Three correction push-pieces to adjust the calendar indications:
Month correction at 2 o'clock, date correction at 4 o'clock, and day of week correction at 10 o'clock
The dial, case, and movement are all signed.
This Annual Calendar mechanism distinguishes between months of 30 and 31 days. The ingenious mechanism is entirely rotary, without the uneven movements of cams and springs in the conventional perpetual calendar.
Patek Philippe produced this model from 1996 to 2005 and was named "Watch of the Year" in 1996.
Complete (box and papers dated 2003)