VENUE: Avalon Ballroom, San Francisco CA DATES: June 7‑9 1968 SECTION: Concert Poster TITLE: Iron Butterfly / Velvet Underground / Crome Cyrcus – FD‑122 “Iron Butterfly” This first‑printing psychedelic poster promoted three nights at the Avalon Ballroom featuring Iron Butterfly, The Velvet Underground, and Crome Cyrcus. Known as FD‑122 in the Family Dog numbered series, it was designed by Bob Schnepf, who signed the piece in silver pen at the lower right. The poster earned a