Description
The Queen Mother on 30th May visited an exhibition of local activities at Welwyn Garden as part of the 50th Anniversary celebrations.
An illustrated cover was produced which depicted the city arms and the founder. The covers could be posted in a special collecting box at the Hertford & District Philatelic Exhibition stand to obtain the special event postmark.
An unserviced cover cost 6d whilst a serviced cover with a 4d stamp cost 1 shilling and a cover with a 5d Architectural stamp cost 1s 3d each