ref. 2484, a little larger than a 96 at 32mm. My grandfather wore this watch every day (except for when it was being serviced) for at least 20 years, until he died in 1981. I have owned it since then, although my father had it for about 15 years (and took good care of it) until the late-90s or so...I guess one could say that this was my first vintage watch!
The shots of the innards are recent, before last week's service. As you can see, my grandfather kept good care of it, with numerous service marks.