Award winning pair of manuscript cards, prepared by Antonio Raggio for the 11th Congreso de la Union Postal Universal (World Postal Congress) Exposition Filatelica Internacional, held in Buenos Aires, Argentina, in 1939.
The award was given to Raggio by La Sociedad Filatelica Argentina for a collection of maps on cards drawn by Raggio for the event, the majority of which consisted of a map and companion illustrated fact sheet. It would seem that the manuscipt cards were likely intended as models for the engraving of stamps.
The attached link shows the award issued to Raggio: /gallery/enlarge/38004a
Finely executed manuscript cards.