Opale n°2, 1971/’72

litografia a colori, es. E.A., cm 55 x 80 (cm 63,5 x 90 misure del foglio)
Firma a matita in basso a destra

Opale n°2, 1971/72
Coloured lithograph, numbered E.A., cm 55 x 80 (cm 63,5 x 90 paper size)
Signed in pencil lower right