Great Britain 1841 Postal Notice. SGPN3Great Britain 1841 Postal Notice. SGPN3. Very fine complete example bearing a 1d red brown PL10 and a top marginal 2d trial with blank corner letters (DP43) from the small trial plate of twelve, together with two 1d pink envelopes in different sizes overprinted with a large red "SPECIMEN" handstamp. An exceptional example without any of the usual tears and splits along the fold lines. Offered with the original entire from the General Post Office,