The charm of the Memovox will always be that, while its face is of a seemingly discreet classical timepiece, its movement hides a complication that is of great utility.
When it was first given to the world, the Memovox was Jaeger-LeCoultre’s answer to an increasing demand for mechanical alarm watches. This was the year 1950 — in the post-war era. Just five short years after the end of World War II, these were times of renewed ambition. People held important jobs and professions now that required for them to remain aware of their schedules in order to stay productive and lucrative.
Therein a wristwatch that was able to help remind the wearer of elapsed time by buzzing out the end of, say a stipulated amount of time, would prove immensely useful in making sure that one was not spending more time that allotted on a particular task.
I am unware as to whether this was the intended intention — but it is well known that as a result of how the mechanism of the Memovox alarm was designed — the sound that it produced when sounding an alarm was more a buzz than a gong that is typical of yet another well sought after complication, which is the minute repeater.