Great Britain
1965 20th Anniversary of the U.N.O and International Co-operation Year Stamp (Ordinary)
SG681b
A very fine unmounted mint cylinder block of 6 with the Lake in Russia flaw. from cylinder 1A Dot R19/3
The top right 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