Groep Nul= O, New Years greetings 1966

Harmonica folded sheet with die cut hole. 30 x 6 cm, closed 6 x 6 cm. Recto printed black on white paper, silver paper verso. Graphic play with numbers represented by the die cut hole.

Text along the sheet says: group O =nul, meilleurs voeux, best wishes, auguri, 't beste, 1966. Signed in black ink by Armando, Henk Peeters and J.J. Schoonhoven recto. Fine copy. Rare.