Bidspirit auction | Michael Martin (20th century British),

Michael Martin (20th century British), Vessell in Yellow, aquatint, signed in pencil and numbered 7/50, H.16cm W.24cm, Michael Martin, Yellow Horse, aquatint, signed in pencil and numbered 10/20, H.22.5cm W.13cm, together with one other aquatint, Mary, indistinctly signed in pencil, H.17cm W.11.5cm