Supplément au Mémoire sur la fondation et le développement de l'Union postale universelle
Subtitle: Feuilles et photographies à intercaler dans le Mémoire (édition de 1924)
Publisher: Impression et exécution, Établissements Benziger & cie, s.a., Einsiedeln (Suisse)
Published: 1929
Place of publication: Berne
Language: ger
Number of pages: 170
Subjects: Universal Postal Union
Notes: The supplement includes a revised t.-p. which reads: L'Union poastale universelle, sa fondation et son développement. Mémoire publié par le Bureau international, 1874-1929.

In the Library of Congress copy the pages and plates have been intercalated in the original volume according to instructions in the accompanying "Avis"; the cover of the portfolio in which they were issued is bound at the end.