Originally Posted by
kk
Hmm I don't know about you but I've never smashed a crystal, mineral or sapphire, in 25 years of faffing about with watches, neither have I done anything to seriously mark or scratch a crystal.
If anything it's acrylic crystals that show marks most easily though of course it's generally not a big deal as easily polished out. For most watches other than something deliberately retro I wouldn't consider an acrylic.
As far as smears go, I carry a microfibre cloth for my specs anyway so giving my watch the odd wipe if it needs it isn't a drama.