Dollis Hill ST5 (2)a 2d Green Phosphor in the pulp IMPERF STRIP

This handmade paper with phosphor ink mixed into the pulp of the paper was susceptible to tearing. It was printed on very thin paper without watermark. The Green phosphor afterglow reacts on both sides of the stamp. Imperf Strip on postcard. Ex Edward Klempka Author of the DOLLIS HILL FIND illustrated on page 14. Cat 3600 ++ pounds