Great Britain 1971 £1 'Postage Dues' (Decimal Currency) Imprimaturs, SGD88var Northern Rhodesia stamps An ex Stanley Gibbons stock

An ex Stanley Gibbons stock item with a Catalogue value of £4

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Great Britain 1971 £1 'Postage Dues' (Decimal Currency) Imprimaturs, SGD88var Northern Rhodesia stamps An ex Stanley Gibbons stockGreat Britain 1971 1 'Postage Dues' (Decimal Currency) SGD88var. Superb unmounted mint with full original gum top left hand corner marginal '2' cylinder block of six imperforate imprimaturs each with a 'British Postal Museum and Archives' handstamp on reverse. Unique. ALERT ME WHEN ANOTHER IS AVAILABLE > SELL ONE OF THESE >