Sapphire crystal is the way to go. I enjoy looking at this watch on my wrist as I am driving because it looks different in the sunlight, the dial has a depth to it you can’t make out it pictures and a richness in color that is really incredible. The luminescent features are rather short lived, but are very bright going from outside to a dark room. Produce enough to be functional with normal use.
My Husband loved his watch, great addition to his collection.