Machins: 10 1/2p Steel Blue Stamps
These Post Office stamps were affixed to specially designed envelopes and postmarked on the first day that the stamps were issued.
26.04.1978 | New Definitive Values, Postmarked at WindsorScroll Down to Buy.
Above image is shown for illustration purposes only, Please check the postmark details of the variety you are purchasing.
Why not take a look at other items on a similar theme?