Dollis Hill ST5 (2)b 2d Green Phos in the pulp BLOCK of SIX

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. This block is annotated by Forster on the reverse 18 Phosphor in pulp hand made paper. Ex Edward Klempka Author of the DOLLIS HILL FIND illustrated on page 19. Cat 3000 pounds