The Mac in Dutch magazine 1969

[lazy poker]

I don't know if this . . . how shall I put it . . . peculiar and rather untypical (at least for 1969) Mac pic from a Dutch magazine has been posted here before.

It's said to have been featured in "Muziek Parade" - the strange thing though is that Jeremy holds a poster of another band (wonder who that is) from another Dutch magazine called "Popfoto", so I'm not too sure. Any explanation, anybody?