Check out this Vulcan Gas Company handbill. The performers were blues / folk legend Mississippi Fred McDowell and local band Texas Rangers. The dates were April 18 & 19, 1969. It measures 7" x 8 1/4" , and is in Excellent Near Mint condition.
Usually put with with "Delta Blues singers," McDowell actually may be considered the first of the bluesmen from the N. Mississippi region - parallel to, but somewhat east of the Delta region - to achieve widespread recognition for his work. A version of the state’s signature musical form somewhat closer in structure to its African roots (often eschewing the chord change for the hypnotic effect of the droning, single chord vamp), the North Mississippi style (or at least its aesthetic) may be heard to have been carried on in the music of such figures as Junior Kimbrough and R. L. Burnside; as well as the jam band The North Mississippi Allstars, while serving as the original impetus behind creation of the Fat Possum record label out of Oxford, Mississippi.
I have a copy of this handbill. It is awaiting framing.