From the web...
“During the 1963 production of From Russia with Love, photographer David Hurn was commissioned to photograph the actors of the film in their costume. When the theatrical property Walther PPK did not turn up for the shoot, Hurn volunteered his own Walther LP 53 air pistol and said he would airbrush out the long barrel; the airbrushed stills appearing in a US “JAMES BOND IS BACK” poster. However, Renato Fratini a film poster artist saw the original stills of the weapon and used it in his U.K. posters with the weapon appearing in several more film posters up to The Man With the Golden Gun. On 14 February 2001, Hurn had his LP 53 (serial number 054159) in its original presentation case and letter of provenance auctioned off at Christie’s where the weapon fetched in excess of US$435,000.”