[Piet Zwart - Bruynzeel blotters]

"Glas voordeuren". December 1958. Pencil dot top right, else lovely + "Bruynzeel vurehouten profielschroten". May 1959 + "Struktakasten gepatenteerde plankdragers". June 1959 + "Bruynzeel houdt Vakantie van 20 t/m 25 juli". July 1959. Pen stripe through the 'd' in 'houdt' and through dates 20, 21, 22, 23, 24 and 25, minimal bend top right.

(total 4)