2d Pale Red-Brown. 'Imperforate Three Sides'.
Post Office fresh Unmounted top sheet marginal mint block of twenty (2 x 10), row 9 MAJOR ERROR: 'Imperforate Three Sides'. The adjoining upper six stamps display a large horizontal perforation jump creating the error.
David Brandon Certificate.
(This item last appeared in the Waldorf Hotel Exhibition hosted by Muscott's on 22nd to 24th June 1960, where it was stated as being the only recorded example).
A HIGHLY SENSATIONAL AND UNIQUE ITEM.