GREAT BRITAIN / UNITED KINGDOM / ENGLAND / G.B. / U.K.
1840 1d grey-black Queen Victoria (penny black), imperforate, plate 1b, check letters AK, used – no thins, tears or bends. A very attractive example with good margins and a clean, black Maltese Cross cancellation.
The 1b state can be distinguished from the original 1a state of the plate by the break in the SW corner of the frame of the 'A' square.
SG Cat. # 3 (SG Specialised Catalogue # AS5)