Was gonna upload a couple of these pics, but realised I had a few more combos of red and black to add to them :)
Above: Snippets from Le Silifer magazine, I assume from 1968 from the dates in the mag. it's about architecture but can't find anything about the publication online.
Above: 1967 instruction book from my Spirograph set.
Above: A projector lamp box from 1977 (found in a stock cupboard in the science department at school)
The Studio art magazine cover from 1951
It's all about limited colour and half tone!