With undated Rolex original Guarantee, Full One Year Service Warranty leaflet dated 8 December 1995 from Rolex U.S.A. and instructions. Furthermore delivered with Rolex wooden green presentation box.
Reference 6240 was the first "Oyster Cosmograph" model produced by Rolex. This novelty predominantly was characterized by the screw down push buttons. Reference 6240 was only in production during the second half of the 1960s and was replaced by the better known references 6263 and 6265.
Reference 6240 is described and illustrated in Rolex Daytona - a legend is born by Carlo Pergola, Stefano Mazzariol, Giovanni Dosso, pp. 76-92, in I Cronografi Rolex - La Leggenda, Pucci Papaleo Editore, pp. 304-311, and in 100 Superlative Rolex Watches by John Goldberger, p. 239.