Its not all just chronos......I do like this one ;-)
Here is the earlier mentioned 5205G (info: Patek Philippe SA)
Description
The new Ref. 5205 Annual Calendar has a distinctive white gold case with delicately pierced lugs. The two-tone dial is available in two combinations: rhodiumed / silvery gray and matt black / slate gray. It indicates the day of the week, the date, and the month in three apertures arranged along an arc in the upper half of the dial.
Technical data
Watch:
Mechanical self-winding movement
Caliber 324 S QA LU 24 H
Annual Calendar
Day, date, month in apertures
Moon phases and am/pm indicator
Sweep seconds hand
Two-tone dial: rhodium- and silvery-gray, gold applied hour markers
Strap: alligator with rectangular scales, hand-stitched, shiny black
Prong buckle
Sapphire-crystal case back
Water resistant to 30 m
White gold
Case diameter: 40 mm
Caliber:
Annual Calendar mechanism
Day, date, month in apertures
Moon phases and am/pm indicator
Center sweep second hand
Annual date correction on March 1
Overall diameter: 32.6 mm
Height: 5.78 mm
34 jewels, 10 bridges
Balance: Gyromax
Vibrations per hour: 28'800
Power reserve: 45 h max.
Number of parts: 347