c.. 1961
Dry pigment and synthetic resin, natural sponge.
1.77 x 2.76 x 1.89 inches (4,5  x 7 x 4,8 cm)

Ex-collection:
The Artist
Museum Haus Lange, Krefeld;
Private Collection, Berlin until 2015

The authenticity was confirmed by RUK, Paris on 10.22.2015.