Canada, Scott 10, used. 1857 6p reddish purple Prince Albert, imperf on very thick soft wove paper, margins ranging from wide to well clear, four ring target cancel. 2016 Vincent Graves Greene certificate states "minor thin at margin", actually the tiny, narrow thin is along the bottom margin and could easily be trimmed out. Excellent color and centering. A rare stamp.  2020 Scott CV: $7,500.00.