These are timepieces which are almost forever.
I own a Genève from 1969, and is still running perfectly, gaining 1 sec a day. And I guess technology in 1969 was somehow not advanced as today.
IMHO few years of technological improvement do not change so much, when it comes to watches. The main difference between the two, if I remember correctly, is that the wave dial has a steel bezel, while the new flat dial has a ceramic. The rest, doesn't change the game so much.
The ceramic is supposed to resister more against scratches and time. But is more fragile when it comes to shocks.
Cheers
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