Lot 70038 – 1879 (Dec 1) 2d Mulready envelope, stereo a195, sent

1879 (Dec 1) 2d Mulready envelope, stereo a195, sent within London and cancelled by London « WC5 » duplex, incorrectly surcharged « 2d » postage due as the Mulready prepaid postage up to 4oz, so the recipient wrote to the Post Office pointing out that error and the P.O. officially responded with a O.H.M.S. G.P.O. printed entire (included) agreeing that the postage due was « erroneously charged » and stated that instructions have been giben to refund the twopence owed to him, a unique item regarding the late use of a Mulready and ideal for the final page of a Mulready exhibit.