Stamps and Postal History of Spain, featuring China, Colombia – Prephilatelic Spanish period –, British Colonies, Japan, Portugal and Switzerland

AUSTRIA. 1857 (March 4). Registered cover from VIENNA to PASSAU (Bavaria) franked on obverse with 1850-54 Machine paper 6kr. brown (Type III) and 9kr. blue (2, Type IIIa), all with four margins, tied by RECOMMANDIRT-WIEN cds´s in black. Passau half-round arrival on reverse alongside six red wax seals. Minor ageing but a very rare cover. Certificate FERCHENBAUER. Mi.4Y, 5Y.