Meisie en voel (Girl and Bird - 1968.46). The illustration has a different background taken from Bird and Girl - 1968.47.
Onder die see (Under the Sea - 1968.69).
Homo ludens - die spelende mens. (Homo Ludens - 1968.64) The illustration has a different colour background
Rhodes. The illustration has different colouring.
Kryger. (Warrior - 1968.40). The illustration has a different background.
They are all from NESOS with interesting differences - showing the tiles and reference numbers in brackets above.