FRANZ ERHARD WALTHER (B. 1939)

FRANZ ERHARD WALTHER (B. 1939)
(i) Zentralbau
(ii) Gegenwärtige Wechselbeziehung
(i) titled 'ZENTRALBAU' (centre), signed and dated 'Walther 66/70' (lower right); signed and dated 'Walther 66/70' (on the reverse)
(ii) signed and dated 'Walter 71/72' (lower right); signed and dated 'Walter 71/72' (on the reverse)
(i) watercolour and pencil on paper
(ii) gouache, watercolour, ink and pencil on paper
each: 21 x 29.5cm.
(2)(i) Executed in 1966-1970
(ii) Executed in 1971-1972