The Watch could receive messages from M and in many cases print them on a ticker-tape to get conveniently study afterwards. Pretty forward of its time for your seventies, I’d say. The Gruen Precision became synonymous with Bond’s early adventures. He wore a single which has a black cloth strap https://www.watchesworld.com/from-sean-to-daniel-tracing-the-evolution-of-james-bonds-iconic-watch-collection/