Yeah, it's genuine - it was released just prior to Docklands, as I recall (I bought mine 9th September 1988 - still got the receipt in the box) - about two weeks prior to when Docklands was originally scheduled for - when Jarre was all over the British press and TV.
Each one was numbered - a total of 3,500 pressed - although how many copies had each number, I don't know - mine is number 818. I do remember they were only on sale for a VERY short time - they were all gone the next week from my local branch, anyway.
The CD version is the original CD pressing of Oxygene from Polydor - pre-dating all the remasters of more recent years - and the booklet has some very nice photos from Jarre's past concerts - taken, I think, from the Remeilleux biography released at Docklands itself.
Oh, and mine is autographed by the man himself - to make it even more collectable.