Bill Monroe And The Blue Grass Boys Grand Ole Opry High School Aud. Concert Poster (1956). Very Rare. Window card printed on card stock for a show in Lyons, GA. on Thur. April 10 "Sponsored by Volunteer Fire Dept.". The poster shows a head and shoulders photo of Monroe and announces "WSM Grand Ole Opry Presents In Person Bill Monroe and his Blue Grass Boys, Blue Grass Quartet, Shenandoah Trio And A Whole Stage-full Of Your Favorite Radio And TV Stars". Printed by Hatch Show Print, Nashville. Measures 14" x 22". In Very Good Plus condition with two heavy creases from the poster having been quarter-folded, as stored by the printer, with wear to corners and edges, general toning, inscribed "56" to reverse.