A FlyerTalk Posting Legend
Join Date: Sep 2002
Location: LAX/TPE
Programs: United 1K, JAL Sapphire, SPG Lifetime Platinum, National Executive Elite, Hertz PC, Avis PC
Posts: 47,183
My DL was issued in 1988, and I re-laminate it myself at Office Depot every time I get a renewal sticker - I doubt it has a watermark.
It expires in 2012, so I'm not getting a new one just because the TSA's little toy can't detect something that isn't there.