1937-47 ½d green, unique horizontal tête-bêche Registration block of 48 spanning the sheet with 11.5mm vertical gutter margin between two tête-bêche blocks of 24

Typewritten Registration Certificate on the reverse reading:

“This sheet of ½d. Unified Stamps, 240 set, was taken in the presence of the Post Office Control Officer at the factory of Messrs. Harrison & Sons, Ltd., at High Wycombe, for the registration of the first print of King George VI stamps of this denomination for Books.

(Signed) D.P. Dell
Senior Staff Officer,
24.8.37.

(Initialled) JWH
Stores Department,
Stamp Section.”