The Patek Philippe Annual Calendar 5035 is a landmark timepiece, recognized as the world's first annual calendar wristwatch when it debuted in 1996. Designed to bridge the gap between simple date models and complex perpetual calendars, it remains a "sleeper" classic for collectors.

• Case & Size: A classically sized 37mm case, available in 18k Yellow Gold (5035J), Rose/Pink Gold (5035R), and White Gold (5035G). It features a stepped bezel and a sapphire crystal display back.

• Movement: Powered by the Caliber 315 S QA (or 315/198), an automatic movement with a 21k gold rotor. It automatically adjusts for months with 30 or 31 days, requiring only one manual correction per year at the end of February.

• Dial Design: The layout includes two subdials for the day (9 o'clock) and month (3 o'clock), a 24-hour indicator (6 o'clock), and a date aperture at the bottom.

• "Ceramic" Dial Note: While often described by collectors as having a "porcelain" or "ceramic" look due to its high-gloss finish, these dials are typically high-quality lacquer or enamel-like coatings over a brass base. The white version is particularly known for this timeless, clean aesthetic.