A group of four signed 1972 Munich Olympic lithographic posters

comprising Piero Dorazio, Coloured Ribbons, numbered, signed and dated '68/200 PIERO DORAZIO 1970' (lower right)
105 x 70cm
Charles Lapicque, Faster, Higher, Stronger, numbered and signed '181/200 Lapicque' (lower right)
103.5 x 70cm
Valerio Adami, Untitled, signed 'Adami' (lower right), numbered 79/200
109.5 x 70cm
Jan Lenica, Untitled, numbered and signed '196/200 Lenica' (lower right)
110 x 70cm unframed