Great Britain 1972 7½p British Polar Explorers (Henry Hudson 1560-1611), SG899a.
A very fine unmounted mint top left hand corner marginal example, with full original gum. Error of missing Gold colour (Queen's head) omitted.
Offered with an example of the normal stamp for comparison.
A scarce QEII error. Pierron records only circa 50 mint examples.
