1967 "Win a Camaro" GM promo
 

I found a few of these envelopes in my shop when I took it over. Never seen these before, some kind of Chevrolet promotional deal when you sold GM replacement parts. forgot I had 'em, and never saw them elsewhere over the years. Anybody else seem them??

http://i56.photobucket.com/albums/g1...psjgrurf7p.jpg

http://i56.photobucket.com/albums/g1...psegf7kb0o.jpg

Yes I have.And it not as good condition as yours.
Promos were "dated",so nearly all of them were destroyed very soon after.
Nice find.