Yes, it is ironic but entirely genuine.
Following a recent house move, I came across a huge carton some weeks ago, with Polygram parcel tape on it, and remembered that, long ago, I'd been given it by our local record shop owner (are there any local single-owner record shops now?) who had remembered my wife's interest in DS/MK. I couldn't recall what the carton contained, so I checked. Mainly, it was a big cardboard construction, in a sort of 3-D format, with the artwork of that album. It came with some flat cardboard advertising sheets with short details from the album.
Also in the carton were copies of a poster. I knew that the poster related to the album, with the blue, yellow and white design, because all the rest of the contents of the carton were that same design. I also knew but had forgotten that there was a photo of MK on the other side and that he was wearing a red shirt. It didn't occur to me, until earlier today, that I ought to check the carton again to see exactly which photo was on the other side.
Lo and behold, it was a version of the poster, as illustrated in earlier postings, in pretty much mint condition, too - no pinholes, not a fold on it and the corners intact. It's about 30" (say 75 cm) by about 20" (say 50 cm) and, having now taken one out of the carton, quite a handsome beast. My wife has confirmed that she would like to sell the duplicate poster.
Mea culpa.