Hi Mark,
I answer also here because a part form the dial that I love , and also remind me the Carrera on the Arno book with the brown subdials, I want to know the opinion of the others guys upon the number in the clasp very unusual and interesting for me!

anyway the water it's the cause for this dial,
form mine I don't think the uv but the composition of the color,in fect they are both with orange index,
strange isn't it?
ciao
A.