Bill Graham's Fillmore Auditorium in the summer of 1966 was not yet the temple of the San Francisco Sound that hindsight has made of it. It was a working dancehall at Fillmore and Geary that Graham was booking week to week, and his instinct in that first year was catholic to the point of contradiction: the emerging local psychedelic bands shared his calendar with soul revues, bluesmen, and -- as here -- clean-cut American pop groups riding the radio. BG-15 belongs to that early, omnivorous moment. It carries The Turtles, the Los Angeles band whose folk-rock reading of Bob Dylan's "It Ain't Me Babe" had reached the American Top 10 in 1965 and who, the following year, would put "Happy Together" at number one in the country.

Underneath the visiting pop headliners was the local scene finding its feet: the bill paired the Turtles with Oxford Circle, a Davis-and-Sacramento psych-garage band who turned up on several Fillmore and Avalon nights that year. That pairing is the period in miniature -- a charting AM-radio act and a raw regional psych band sharing a Graham stage -- and it is the real bill rather than an invented one.

The poster is the work of Wes Wilson, Graham's house designer through almost the whole early numbered series, whose flame-lettering would shortly become the visual signature of the Fillmore itself. (The catalog also attaches the name of Heinrich Kley, the German pen-and-ink illustrator who died in 1945 -- not a 1966 collaborator but a source whose drawings Wilson and his peers openly adapted; the credit records borrowing, not co-design.)

What this page does NOT pin down is an exact date, a setlist, or the true headline order -- the run's poster sits in catalog sequence right after BG-14, the "Independence Ball" of July 1, 1966, which places it in that same early-July stretch, but the precise night and run length are not asserted here (the record is flagged approximate accordingly). What is solid is the shape: a Wes Wilson poster, a chart-pop headliner over a local psych band, the Fillmore in its first omnivorous year. Sometimes the honest version of a night is the modest one.