Dollis Hill Black Dummy Stamp with two 8mm Violet Phosphor Bands (2 covers)

Sale!

Original price was: £600.00.Current price is: £552.00.

SKU: M257306

The Bars were printed under the black squares. Trials to asses the impact of strong black printings upon envelopes impact upon the phosphor readings .Ex Edward Klempka Author of the DOLLIS HILL FIND illustrated on page 37