Produced in 1961 with only 3 examples ever, the exceptionally rare Ref. 3449 from Patek Philippe is perhaps best known for being one of the rarest perpetual calendar wristwatches from the manufacture. This particular Ref. 3449, movement no. 799002, is one of the three examples.
Also known by its nickname Tre Scalini (Italian for Three Steps), its triple-stepped bezel, coupled with the straight lugs that extend beyond those of its counterparts, gives an increased presence on the wrist, arguably raising the desirability of this particular reference.