1980 Catalogue Image
In the mid-'70's userpers appeared, they looked so cool in the box but were a major disapointment once they were out of the box! In the above image the earlier box is the lower one, the H&F panel being added quite soon after these sets came out.
Thanks to Kostas for the 1975 catalogue scans this collage is created from. The first appearance of the the white 'corner' boxes, I think.