An interesting back cover variation! My faded/duplicate images (667083 & 667084, as well as 689705) may be deleted, as the newly uploaded ones by Gregs78s represent them better.
Also, to put the labels in chronological order:
1st = green, 2nd = red, 3rd = purple (and the 4th and last would be black with rainbow rim).
Back cover variation added,with,what at first,i thought were hand written personnel notes by a previous owner,but they are,in fact,under the lamination,and therefore part of the original artwork.Also a colour/scanning variation of make 1968's labels (images 667083/84) also added.Front cover matches image 667076 eactly.