Annual Radio Exhibition, August 25 – September 11, 1938, Polish YMCA Building. With ticket no. 1667.Dom Prasy S.A., Warsaw.Format: 18.5 x 10.5 when unfolded. Condition: with a stamp and commemorative postmarks, no address, ticket stub with perforation, a small hole where the dry embossing was (someone pressed too hard; thin paper), a tear at the top, minor soiling.