A rare 10″ acetate of Joni Mitchell’s “All I Want”, the first song on her acclaimed 1971 album Blue.  This 45 rpm acetate was made by Warner Bros Music, who administered Joni’s publishing company Siquomb Music.  Acetates like this were made to send to other artists, in an effort to generate cover versions.  According to JoniMitchell.com, “All I Want” has been recorded by 110 other artists!  In excellent condition.