The Watch could get messages from M and in many cases print them on a ticker-tape to get conveniently read through afterwards. Fairly in advance of its time to the 1970s, I’d say. Absolutely sure, Fleming accustomed to wear a Rolex Explorer, and it is likely the watch he experienced https://www.watchesworld.com/from-sean-to-daniel-tracing-the-evolution-of-james-bonds-iconic-watch-collection/