TYPE: AP6
ISSUED: March 27, 1931.
Type of AP5 overprinted in black or green “Zeppelin 1931,” re-issued in new colors.
HISTORY: Flown covers are known postmarked March 27, 1931 and March 28, 1931, issued in connection with and commemorating the visit of LZ 127 Graf Zeppelin to Budapest.

NOTES: Both known imperf.