Original 1st printing 14 x 20" untrimmed color proof concert poster for Quicksilver Messenger Service appearing with the Other Half and the (Steve) Miller Blues Band at the Avalon Ballroom in San Francisco, CA from 1/6-7/1967.
Art by Victor Moscoso, image is # 42 in the Family Dog/Avalon series, this is a PINK-ONLY variant/printer's test proof.
Medium flat vellum stock poster is in GORGEOUS mint/near mint to near mint (A/A- to A-) condition; aside from a nearly-invisible stray handling ding or two and the slightest trace of surface wear (a tiny pin-prick spot or two), it is an ULTRA-crisp example of this VERY uncommon Moscoso Avalon variant.