paleshadow

Hi all. I'm wondering about the origin of this sticker: My childhood space sets (such as 894, 6822, 6881, etc) appear to have release dates in the range 1979-1984. I've looked through sticker sheets and space set inventories from that date range plus a few years on either side but have come up empty. Hopefully someone will just recognize it? Edit: The answer (h/t 560Heliport at the Brickset forums) is that these stickers came with Idea Book #6000 from 1980.