1980 United Kingdom
Six blue vinyl singles housed in a plastic wallet/hanger, each with their own picture/lyrics card.
Three different blue vinyl variations are known but not all singles come in these three blue variations. (As far as I know, I've checked all my 100+ sixpacks)
Information about the matrixcodes I could find out is the following;
All the codes are handwritten and are written toward the label (+) or facing the label upside down (-)
Roxanne, Can't Stand Losing You & Message in a Bottle also come in black vinyl mispressings.
There are also a few other mispressings. If anyone has more information about the sixpacks you can mail me, thanks.