I came accros this youtube
https://www.youtube.com/watch?v=CXX36b_mlMo
It shows The Four Tops in 1967 during immigration at the old ( than rather modern) terminal . Wooden benches...
Just give yourself some minutes to sniff up that old black & white nostalgia at Zaventem.
The border control is still the same: they didn't laugh either in 1967