Here we have a rare classic 1971 Patek Philippe Calatrava Blue Sigma Dial White Gold 3445/6 with a beautifully sculpted 35mm 18ct White Gold case that gently flows over your wrist thanks to a smooth snakeskin patterned integrated bracelet. In 1961, Patek Philippe introduced this 3445/6, which was available in four exquisite metal variations: yellow gold, white gold, pink gold, and platinum. Each metal option had its own unique aesthetic, with yellow gold exuding warmth and luxury, white gold offering understated elegance, pink gold showcasing a romantic and timeless appeal, and platinum radiating a cool and sophisticated charm. The lug-to-lug length of 35mm and a case thickness of just 9.5mm ensures a comfortable fit. On the right side is a signed crown recessed into the case for protection. A textured bezel holds a domed crystal above the star of the show, a sunburst Calatrava blue Sigma dial, so named due to the sigma σ from the Greek alphabet at 6 o'clock. The Calatrava dial launched in 1932 was created by David Penney who took inspiration from the Bauhaus movement and its simple functional artistic form. An outer minute track has 18ct White Gold baton indexes marking the hours, at 3 o’clock a framed date window, and elegant 18ct White Gold stick hands complemented by sub-seconds at 6 o’clock that perfectly balance this sophisticated dial, and at 12 o’clock we have the Patek Philippe motif. On the reverse a screw-down case back with the Swiss Hallmarks stamped, inside an automatic Patek Philippe Cal. 27-460M, 30 jewels, beating at 19,800 beats per hour, introduced in 1961 and remained in production until 1986, this high-grade movement is just 5.35mm thick, complete with an 18ct Gold rotor engraved with the Patek Philippe Calatrava Cross and beautifully decorated. The watch comes paired with its full-length integrated 19.5mm 18ct White Gold textured bracelet and a signed folding jewellery clasp, and the watch comes with its Patek Philippe Archive Extract.