A special pictorial postmarker and a temporary post office were provided at the Melbourne Hilton Hotel during the 14th Annual Conference of the International Federation of Air Traffic Controllers’ Association, held from 14th to 18th April, 1975. The special cancellation was applied to a total of 4,016 articles including two registered.
Details
- Date: 14 April 1975 – 18 April 1975
- Quantity: 4,016 articles
- 4,014 (ordinary)
- 2 (registered)