Strip of 2d Blue stamps on piece lettered R-D, R-E and R-F, identified as coming from plate 4 using British Line-Engraved Stamps. Twopence Blue. Studies Of Plates 1 to 15 by H. Osborne. Period of use: Plate 4 was completed on November 29th, 1849 and put to press early the following month – the Imprimatur … Read more
