What is this Picasso?, from The Blue Guitar (S.A.C. 218; M.C.A.T 197)

DAVID HOCKNEY What is this Picasso?, from The Blue Guitar (S.A.C. 218; M.C.A.T 197) etching and aquatint in colors, 1976-67, on Inveresk, signed in pencil, numbered 106/200 (there were also 37 artist's proofs), published by Petersburg Press, London and New York, 1977, with full margins, generally in very good condition, framed P. 13½ x 16¾ in. (343 x 426 mm.) S. 18 x 20 5/8 in. (457 x 524 mm.)