Hi,
So your watch turns 60 this year! So does the reference 530 too, that would make a nice new "simple" chronograph base! But we are all waiting for new chronographs so that's nothing special!
You watch is a form watch! May I hope for my 5109 or close with a 25-21 REC PS? I would bet on this one.
The potential new round simple beater would be great too but I see no clue for this one in your pic.
Cheers
Dje
ps: you know more than you want to say!