Great Britain 1840 1d black, Plate 1b, SG2Great Britain 1840 1d black, Plate 1b, SG2. A very fine used close to large four margin vertical strip of four lettered 'OC RC', neatly cancelled by crisp black Maltese Crosses. An attractive multiple of the first printing plate (repaired) and unusual to find a vertical strip of this size. GB Specialised Catalogue No: AS5. Stanley Gibbons do not list the value of a vertical strip of four in their catalogue. They list the value of a block of four