General Tagging along all edges of stamp.
Single from pane of 100,
CBN printings have a darker blue sky. Mi CA 1161A has 15 teeth horizontally.
Under UV light stamp paper emits moderate bluish-white glow, fluorescent frame glows yellow-white
Peterborough Paper. Chalk surfaced paper. Single from pane of 100, printer APL. APL printings have a lighter blue sky. Mi CA 1161f has 14 teeth horizontally.