Dollis Hill Dummy Stamp with 9.5mm Violet Phosphor 1965 and 1966 Trials

This cover was originally posted in Camberley on the 16th of January 1965 (The dummy stamp was then removed). The cover was then re-used in London on the 21st of January with the Dummy Stamp applied (9.5 mm Violet Bands).Ex The Edward Klempka Collection who was the Author of the DOLLIS HILL FIND