Did you know that around 2002 Rolex started laser engraving a crown in all the sapphire glasses? Every dot is in a different depth in the sapphire. : r/rolex
Top 9 Things You Didn't Know About Rolex | Crown & Caliber | Crown & Caliber Blog
Sapphire Glass and Gasket with Windows for Rolex Datejust, Day-Date 36mm | Parts For Your Watch