pencil on paper cut out a passe-partout: 19 x 10 cm signed and dated lower in the middle "Tichý 42"   Provenance: private collection, Vienna   Verso confirmation of authenticity by Professor Frantisek Dvorak from 9/9/1989 attached. Consulted with Professor Jaromir Zemina and Dr Jiri Machalicky. Confirmation of authenticity attached.