I never understood the point in people replacing clean crystals with deep crystals, until I bought my BTF Daytona with a white dial. The white dial clean Daytona I have looks almost gray beside the BTF. It is a pretty massive difference in clarity. I know BTF does not use deep, but whatever they are using is so much better lolBTF don’t use deep crystals but what they do use is in a completely different league to the trash that CF use.