There has been several colors used in the AR over the years at Panerai. Blue, Purple, light yellow, Clear, ---
I'm also wandering about DSN. It has been posted here that some members have been disappointed with his current crystals.
I've never seen the price of a Gen. crystal. My 3 year old Noob 111 is terrible and somewhat cloudy at many angles.
AR cannot improve the quality of the sapphire itself. And more than one crystal has been found that is a sandwich, or two layers stacked together. This caused a reflection between the two layers. No AR can correct that!
Knife