(i) signed with the artist's initials and dated 'RB 76' on the reverse
(ii) signed with the artist’s initials and dated 'RB 75' on the reverse

(i) Letraset and graphite on card
(ii) Letraset and graphite on graph paper

(i) 20.2 x 20.2 cm (7 7/8 x 7 7/8 in.)
(ii) 28 x 43.1 cm (11 x 16 7/8 in.)

(i) Executed in 1976.
(ii) Executed in 1975.