5th World Energy Conference, Vienna 2.40 öS — Austria, 1956
5th World Energy Conference, Vienna (Austria, 1956), face value 2.40 öS. Photo, catalogue value, details and photo identification.
- Issue date
- 1956
- Face value
- 2.40 öS
- Colors
- Cobalt
- Print run
- 2,000,000
- Yvert
- AT 859
- Michel
- AT 1026
- Stanley Gibbons
- AT 1283
- Scott
- AT 611