How do I identify a Classic Records label reissue of Led Zeppelin II?

Hello fellow audiophiles:

I believe I have a copy of the Classic Records reissue of Led Zeppelin II. I'd like to sell it, but obviously need to be sure it's the real deal. 

How can I be sure it's a Classic Records reissue? The Classic Records sticker on the shrinkwrap is missing, but it's clearly a heavier "audiophile" vinyl, at least 180 grams. 

Any suggestions would be very welcome. 

Thanks, 

Steve