Great Britain
1965 20th Anniversary of the U.N.O and International Co-operation Year Stamp (Ordinary)
SG681a
A very fine unmounted mint positional block of 6 with the Broken Circle flaw. from cylinder 1 Dot R11/4
The bottom left hand stamp has the flaw.
Unmounted Mint

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