Great Britain
1962 National Productivity Year (NPY Ordinary)
SG632c Kent Omitted Error in an umnounted mint positional corner block of 6 from Cylinder 2C 2B No Dot R18/12
Top right hand stamp has the error
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