This
version of the DCA logo was used on Departmental aircraft from the late 1940s
through to November 1973 when the DCA was incorporated into the Department of
Transport (click here for an organisational timeline).
The logo incorporates the King's crown which, technically, should have been superseded
in 1953 by the Queen's crown.
The photo at left
shows the DCA aircraft logo on Cessna 170A VH-CAS. Click on the image to see the
whole aircraft.