Great Britain 1840 1d Greyish black Plate 11 & 1841 1d Red-brown Plate 11, SG3/7.
Very fine used four margin matched pair lettered EK, both neatly cancelled by black Maltese Cross.
A very rare combination of the plate 11 printings.
GB Specialised Catalogue Nos: AS72 & AS74.
The SG catalogue price in the Great Britain Specialised Queen Victoria catalogue 2011 is £4,500 for the 1d greyish black and £130 for the 1d red-brown.