Quote Originally Posted by boyscout View Post
post 1986 watch are not scratch resistant. they are not made of glass either but plastic.
Here's what my Rolex Datejust manual says (on Page 4):

The Rolex Datejust model is the front-runner of the Rolex Oyster Collection...All are fitted with a crystal crafted from a solid block of synthetic sapphire that is virtually scratchproof.

Mine was purchased 2006. I use it everyday, not a single scratch so far.