Highlights of Swann Galleries' annual summer Vintage Posters auction on July 30 include:* Ernest Montaut, Cabanne - Nirouet (Ch. Wallac, Paris, c.1905)* Louis Charbonnier, Scala / La Danse des Jambes en l'Air (La Lithographie Nouvelle, Asnieres, c. 1897)* Tom Purvis, Mablethorpe & Sutton - On - Sea / The Children's Paradise (Dangerfield Printing Co., London, c. 1926)* Fougasse (Cyril Kenneth Bird), Careless Talk Costs Lives, c. 1940* David Hockney (d'Aprés) Los Angeles 1984 Olympic Games, 1984