Different versions of the Buckingham Nicks vinyl?

[guitarchick82]

Yesterday I was in Berkeley and decided to stop in to Amoeba Music to see if they happened to have the Buckingham Nicks album. I went to the Fleetwood Mac section and low and behold, the BN album is the first one in the stack! They only had one copy and seeing as it was only $20, I decided to buy it. It looked to be brand new and sealed. Once I got back to my car and opened it, I started noticing some things. For one, it doesn't say Polydor on it. Instead it says Anthem. It is a gatefold and it looks identical to the original Polydor gatefolds I've been people post pictures of. It's got the lyrics, the credits, the picture of Lindsey and Stevie smiling and goofing around, etc. When I took the vinyl itself out, I was surprised. Instead of the standard black vinyl, it's a green marble color! Very pretty but it definitely made me think, "Hmm, what is this that I've got here?" I did some research online to see if maybe this was some kind of later release version or something.

Does anybody on here own one of these or at least know where they're from/when they were released? I'm puzzled!