16, 17 and 18 June 1958
In general, at philatelic level, Germany was one of the few countries with date cancellations issued, which were covering all the days 16, 17 and 18 June 1958.
The cancellation of the 16 August was issued regularly whereas the ones of 17 and 18 August were rare. The cancellation of 17 June is most rare.
Official Expo 58 cover edited by Campo Rodan
The Official edited cover with logo of the country (edition is not identified).
Back of postally sent postal card with cancellation date 17 June 1958 (R).
Maximum card with German Building at Expo, with cancellation of 18 June (r)
Large Expo 58 cover with the cancellation of 18 June 1958 (r)