Beta 21 3587

Patek’s first Beta 21 watch, US$3,500 at launch in 1969 (a 2499 was US$2,200). Massive two-piece Ateliers Réunis case (maker’s mark 28) with water-resistantWater resistanceA watch’s ability to resist water entering its case under specified conditions, often stated as a pressure or equivalent depth. Seals can deteriorate and the crown can be damaged, so an original rating does not establish a vintage watch’s present resistance. screw back. Two-tone blued-gold Stern dial with a matteMatte dialA dial with a low-gloss surface finish. It describes the finish rather than a particular colour or luminous material. outer zone and green seconds markers, lumed gold batons and hands, framed date window and “Aprior σ Swiss σ” at 6.