Etching and aquatint on wove paper, 21.8 x 27.8 cm (line plate), 23 x 33 cm (colour plate, uncut), 28.5 x 38 cm (sheet). 1964. Trial proof, the colour plate for the background not yet formatted. Unicum. Monogrammed A.M. in pencil and inscribed "essai de couleurs pour le fond" by the artist in the lower margin. Provenance: Ex collection Roger Passeron
