Hmmm... the previous post has a broken link... this is it.... (URL) is where the wooden box design originated from.... the back side image of 1957-60 spare parts packs. Gary Istok (12 years ago, 10-Jan-13, to lugnet.general)
(...) Well got a quick reply from the Billund Archives folks today. They have never seen that set either... and believe it is of Swedish origins (circa 1959), and as I mentioned, likely an institutional school set. Gary (12 years ago, 12-Jan-13, to lugnet.general)