Patek Philippe Perpetual Calendar Ref. 3940R. Crafted in 18k rose gold, this fourth‑series example features an opaline dial with a complete suite of calendar indications - day, date, month, leap year, moonphase, and 24‑hour time - powered by the slim, self-winding Calibre 240 Q.

The movement, beautifully finished and stamped with the Geneva Seal, is visible through a sapphire crystal display back.

The watch is paired with its original Patek Philippe leather strap and matching rose gold deployant clasp, and is accompanied by an Extract from the Archives confirming manufacture in 2006.