George VI 2d. Imperium Type in a Plate number pair. Mint never hinged Very Fine. Stanley Gibbons cat. £2,80 for normal stamps. The Imperium series was generally printed in two entries; the first was for the Duty Plate: the country and the value, the second was the Head Plate: the frame, portrait and ornamentation. This interesting example shows a #2 in a circle for the Duty Plate entry and a #3 in a circle for the Head Plate Entry. Our Price: $15.