Patek Philippe. A fine and rare stainless steel manual wind wristwatch Reference: 2509 A Date: Manufactured 1955, Purchased 14th May 1956 Movement: 18-jewel Cal.12-400 manual wind, adjusted to heat, cold, isochronism & 5 positions, Gyromax balance, No.726079 Dial: Silvered, applied polished faceted hour markers, dart quarters, gilt outer minute divisions, subsidiary seconds at 6, polished faceted lance hands Case: Polished round, screw down back, No.672023 Strap/Bracelet: Black Patek Philippe alligator leather Buckle/Clasp: Signed steel buckle Signed: Case, dial & movement Size: 35mm Accompaniments: Extract from the Archive, service case, Boodles service receipt dated 2019 Footnotes: In 1950 Patek Philippe launched two larger sized Calatravas - references 2508 and 2509. Reference 2508 featured centre seconds and Reference 2509, as with the current lot, has subsidiary seconds. Both references were only in circulation for a relatively short amount time making with the current lot is an earlier example dating from 1955 with a 2nd Series dial. Of these larger sized Calatravas only 20 examples in stainless steel are known to the market of the 2509 making this a particularly unusual and rare vintage Calatrava. This lot is subject to the following lot symbols: Y Y Subject to CITES regulations when exporting items outside of the EU, see clause 13. For further information on this lot please visit Bonhams.com