Logo & stationary my dad designed for his interior design practise (early to mid 70s) (Taken with instagram)
The text reads:
designer - interior architect n.h.i.b.s.
N.H.I.B.S. stands for Nationaal Hoger Instituut voor Bouwkunst en Stedebouw (National Higher Institute for Building Arts and Urban Design) — which now, after many name changes, is the dept. of Architectural Sciences at the Artesis Hogeschool Antwerp, where he was a professor.