1930, East voyage, droped Riga with handing in for transport Berlin - International Postage Stamp Exhibition, card with on the back IPOST souvenir sheet with posting stamp "BERLIN W62 International Postage Stamp Exhibition 21.9. " to Riga with arrival postmark and postage due tax cancel for the post storage fee, souvenir sheet a little blotched and according to in detail photo expertize leather International Association for Philatelie Experts about weinige millimeter shortened, despite the restrictions an extremely scarce use, probably there are only in each case a document from each the East voyage threw off!