Lot 338, Nova Scotia 1851 six pence yellow green, VF unused July 24, 2020January 4, 2017 by Sparks Auctions Lot 338 Nova Scotia #4 1851 6d yellow green Heraldic Imperforate, unused (no gum), with four clear and even margins. A very fine and lovely stamp. Accompanied by a 1998 Greene Foundation certificate. Unitrade CV$6,500.