Great Britain
1967 EFTA Stamp (Ordinary)
Listed Flaw SG176h Broken Undercarriage (Strut) from cylinder 3 No not position R13/6
A superb unmounted mint positional block of 4 with the bottom right stamp containing the flaw.

UK GB British Stamps
Queen Elizabeth II
Pre-Decimal Commemorative Stamp Sets
Catalogue Numbers used are taken from the Great Britain Concise Stamp Catalogue
and are used with the kind permission of Stanley Gibbons Limited