Great Britain 1991 28p Bicentenary of Ordnance Survey, SG1579var.
A superb unmounted mint, with full original gum, example with 26p for 28p error of value.
Offered with an example of the correct value for comparison and display purposes.
A scarce QEII error, Pierron records only circa 20 mint examples.
SG Catalogue Value: £4,000.
