This Rolex Chronograph reference 6238, also called the famous Pre-Daytona, was worn by James Bond aka Mr. Lazenby in the movie
‘On Her Majesty’s Secret Service’ in 1969.
The watch has full provenance as I understand. What a story.
http://www.forbes.com/sites/elizabethdoerr/2016/06/30/james-bonds-original-rolex-ref-6238-from-on-her-majestys-secret-service-goes-under-the-hammer/#dbb17d238bbe)