Great Britain
1967
Block of 4
SG 752
British Discovery & Invention
4d "Radar Screen" Commemoratives - never mounted or hinged
I will combine postage on multiple purchases made at or about the same time.
For quality self catering holiday cottages in West Wales (near the coast at Cardigan & Aberporth), check out:- www.cefnllaethdre.co.uk