For Sale is one (1) Family Dog Postcard FD-58-OPC-A.  Original First Printing, not a reproduction.  Concert Venue: The Avalon Ballroom, San Francisco.  Concerts featuring: Quicksilver Messenger Service, John Hammond & His Screaming Nighthawks, Charles Lloyd. Concert Dates: April 21-22,1967.  Artist: Rick Griffin. The Postcard measures: approx. 5" x 7".  The Postcard is beautiful, very clean, with soft corner points, and graded NEAR MINT uncirculated condition.  View the images provided.  Visually graded under very bright lighting and magnification.  Foreign please email me for multiple items Shipping costs (i.e. Insurance, Registered, Tracking Number,  etc.).