The ref. 2507/1R is a relatively unknown and rare reference from the 1950s. As thinner watches became increasingly fashionable, Patek offered Calatravas featuring its thin caliber 10-200. This example was made for the US market as indicated from the HOX on the movement and 18k on the outside caseback. This example has just been serviced and has a recent Extract from the Archives.
REF. 3696J
PATEK PHILIPPE CALATRAVA REF. 3796J
Patek Philippe 18k yellow gold manual Ref. 3796J, circa 1988
$ 18,000.00