Auction # 2506 WORLDWIDE + ARGENTINA: Special auction Punta del Este Exposition

Postcard sent from San Sebastián to Argentina on 1/AU/1938 franked with 15c. uncancelled, on back there is a nice block of 12 patriotioc Francoist stamps, varied marks and Buenos Aires arrival, and on front a rose mark of military censorship. With interesting text: instructions about how to send postage stamps for exchange, according to the Spanish laws.