(OB-741) Serigraph #27 in "The Angles of Open Form Infinite Space from Cinètisme to Open Form 1949 - 1968" Edited in 1968 in New York, Paris and Stockholm. Edition limited to 300 albums. Each serigraph numbered 1 to 300, signed by Baertling. L-G sts 14st, F-9 sign 1st glas.
