WCFields ElectricStringbandConcertPoster+Handbill Happening SunsetLosAngeles1967

Description

Original concert poster & handbill for the WC Fields Memorial Electric Stringband and The Puzzyl performing at the Happening located at 2905 Sunset (Strip) at Silverlake in Los Angeles on May 26th-28th, 1967 per universal calendar dating and Chamberlin artist credit right side below image.
Only ones I and couple other longtime experts have ever seen and I still can't find any details on the bands so any information would be appreciated.  Believe I had another great, more colorful psych poster from the Happening years ago and sold at auction.   Venue details also hard to find so any info helpful.  I hunted/collected the unusual/odd, especially venues and still have some great material to let go sometime, although many unique posters already sold mostly at SFRock auctions over the years .....  time goes by like a fast river even if we wish it was a meandering, gurgling, clear stream .....
Will take better pics soon since bright sunlight washes out pics.   In excellent condition for their age with some light general wear/handling --  any round shadow lower/middle right front/back is just camera lens shadow NOT on poster -- please see pictures for condition and ask questions in advance if helpful. Will be mailed well-packed with insurance.
Fillmore era 60s psychedelic poster memorabilia.