Britain. Michel 4a used, 1841 Queen Victoria, with line under Postage 2 d blue, watermark small crown. A most unusual block of six of the 1841 2d blue, on piece, all used with neat '21' in oval pmks and corresponding And over double circle pmk, lightly to upper left. There are a few small faults, nevertheless as a used multiple of six, this is highly unusual and scarce. Cat. as single stamps only at £660 SG #15, this is however as a multiple many times scarcer than that due to its rarity in this block format.
