As OO-UBA is fitted with mail containers and the airborne helicopter is not, this photo may well show Sabena's maiden Helipost service on 21 August 1950. It appears that a helipad had been built on Jan van Rijswijcklaan on the site of the current Antwerp Expo building. Photo from: Paul Lammens collection
This photo was added on 16 July 2021, and has since been viewed 598 times.