"When I Paint My Masterpiece" is a 1971 song written by Bob Dylan. It was first released by The Band, who covered the song on their album Cahoots. Dylan himself recorded the song in March 1971 for Bob Dylan's Greatest Hits Vol. II, on which it is segued back-to-back with "Tomorrow is a Long Time". (An outtake of the song, from the same March sessions, was released in 2013 on The Bootleg Series Vol. 10: Another Self Portrait (1969–1971).)Wikipedia
The Rolling Thunder Revue - on mandolin Dave Mansfield (i,m not sure)