Auction # 2444 WORLDWIDE + ARGENTINA: Extraordinay November auction

RAILWAY PO CANCELS: 5 Covers sent from towns in the provinces of Río Negro or Neuquén to Patagones (south of the province of B.Aires) franked with 5c. or 10c, all with interesting postal marks of different railway PO: "OFICINA POSTAL AMBULANTE Nª100, 128", "BRIGADA 35", "ESTAFETA FERROVIARIA 21-15", very fine quality, interesting group!