I was lucky to have recently photographed a 3130 from 1986 and 3310 from 1987 that both belong to a friend. The 3130 was unusual in that it had a sapphire caseback, which I believe did not appear on many of those early models. Enjoy!
Interestingly, some 3137s I've seen have the plain moon, as per the 3130/3330, while some have the "man-in-the-moon" disk. I wonder when Breguet made the switch?