1950-52 ½d pale orange, unique horizontal tête-bêche Registration block of 48 spanning the sheet with 11.5mm horizontal gutter margin between two blocks of 24

Printed Registration Certificate on the reverse with manuscript entries reading:

“THIS sheet (216 set) of Unified ½^d for “E” Booklets WAS TAKEN IN THE PRESENCE OF THE POST OFFICE CONTROL OFFICER AT THE FACTORY OF Messrs Harrison and Sons Ltd. AT High Wycombe, Bucks FOR REGISTRATION OF THE FIRST PRINT OF this denomination

(Signed) E. Carr
CHIEF EXECUTIVE OFFICER
3^rd Decr. 1951

(Initialled) HWP
INITIALS OF CONTROL OFFICER
SUPPLIES DEPARTMENT
STAMP DEPOT”