Équation
Etching and aquatint in colours, probably 1987.
No longer recorded by Galfetti. Signed and numbered 17/50. On Arches (with watermark). 31,2 : 47,5 cm (12,2 : 18,7 in). Sheet: 50 x 65,2 cm (19,6 x 25,6 in).

Slightly light-stained in the edges. Loosely mounted on the reverse. [HD]