15
he total number of plates used to print the Twopenny Blue. Plates 1 and 2 had no white lines and were imperforate, Plate 3 onwards had white lines. Plate 3 was only used imperforate, Plate 4 both imperforate and perforated, Plate 5 onwards were all perforated. Plates 7 to 15 had letters in all four
