" Quicksilver Messenger Service " is a rock band from San Francisco USA circa 1968, this picture is a Watercolor Type of Illustration & A Tribute to one of the Greatest Poster Artist's of all time, Rick Griffin, I have always admired the freehand typography he came up with... he was a true "Font Genius". R.I.P. Rick. This Piece is Acrylic on watercolor paper, thin washes of color, and sharpie markers.