ANK 556 A "WIPA Envelope" 1933 in good condition
The official “WIPA envelope” for the Vienna International Philatelic Exhibition of 1933. This special envelope was specifically created for the issue and presentation of the famous WIPA block (ANK 555 A) and is considered a collectible item in its own right within the exhibition issue. A copy in good condition is rare, as many envelopes are damaged or incomplete. Particularly collectible are envelopes that are unwritten, neatly folded, and with fresh colors. This item is a historic philatelic document from the interwar period and a sought-after piece among collectors of classical Austrian issues and philatelic exhibitions.
