I have it too.
Not too bad, but it's not real.
Warners didn't make any quads past mid 1975. Last of their unreleased quads were two Tulls, Rod Stewart and a Leo Sayer all from that year.
WEA quadradiscs were issued up to 76, I believe.And at this point the final releases for the most part, contained a QUADRADISC sticker on a stereo lp.
One of the last two I bought were Joni Mitchell's-Hissing Of Summer Lawns and The Eagles-One Of These Nights.
There were actually a number of discs withdrawn by WEA .The listings were from SCHWANN and were in the monthly edition for quite some time (approx 1 yr).
Schwann was incredibly accurate with their quad listings and usually if it was listed it was available-or very soon to be.
The discs I noted from WEA'S final quad push, but were withdrawn are ;
Jethro Tull-Minstrel In The Gallery
Jethro Tull-M.U. Best of
The Beach Boys-Good Vibrations
Leo Sayer-Another Year
Todd Rundgren-Initiation
Carly Simon-Another Passenger
Gregg Allman-Laid Back
Black Sabbath-Sabotage
Deep Purple-Burn
Uriah Heep-Return To Fantasy
Black Oak Arkansas-Street Party*
Billy Cobham-Spectrum*
Frank Zappa-One Size Fits All
Foghat-Energized
Foghat-Rock And Roll Outlaws
The Eagles-The Eagles
The Eagles-Desperado
J. Geils Band-Bloodshot
Gordon Lightfoot-Gord's Gold
Rod Stewart-Atlantic Crossing
*also listed in the WEA, Panasonic, and JVC 76 quadradisc booklets promoting CD-4 discs already released !
The good news is that most of these titles likely were mixed but last minute withdrawn, when in late 76 WEA threw in the towel on Quad.
There may be a couple I've missed but that is the list I know of and have kept note of. Now it's up to A.F. to hopefully find the WEA quads and release them, and I hope they can obtain a few of these.