I have a used penny stamp King George V and wonder if it worth anything?
It has red lion lying between two 1s and one penny underneath. Postage and Revenue are in capital letters on ribbons either side of a crown. The King's head is bordered by a wreath. The stamp is franked - 5 black lines across the stamp. It has perfins - H I & S (I only know they are called that through searching on web). Would like to know something about it - and any value attached to it?