Flying Beer Glasses. Hamburg: Bartl-Willmann, ca. 1920. Tumblers of beer visibly vanish from one tray and reappear on another, held some distance away, by an assistant. Nickel-plated trim. Trays 11 x 13 ??. Celluloid glasses and fabric covering brittle; mechanism operable and intact. Rare. Perhaps the German equivalent of the classic David Devant effect published as the ?Flying Glasses of Stout,? this model, perhaps the only surviving example of the prop extant, relies on spring-loaded mechanisms to vanish and produce the glasses. When the first set of three tumblers vanish, the tray can be shown front and back.