Lot 776, New Brunswick 1851 six pence olive yellow Heraldic, VF used with Richibucto 23 oval grid April 3, 2023 by Sparks Auctions Lot 776 New Brunswick #2 1851 6d Olive Yellow Heraldic Imperforate, used with a crisp strike of the “23” oval grid cancel (Richibucto), margins are large and even all around, very fine. A very nice stamp. Unitrade CV$1,600.