Hi,
The 5123R is a watch that needs to be tried on (well all need I know, but specially this one).
Regarding the 80th anniversary, I share your opinion. But the year is not over and Patek Philippe generally doesn't celebrate at Basel. I don't know if they plan to do something, but if they had to do something I'm pretty much sure they would not have done it this week.
Wait and see!
Best
Dje