Lot 537, Canada 1938 10/12c blue Caribou beer revenue, NG XF pair July 24, 2020May 15, 2018 by Sparks Auctions Lot 537 Canada #NFB1 1938 10/12c blue Caribou Beer Revenue, Perforated 12 x 13¼, an unused (no gum, as issued) vertical pair, for “Beer under 3% Alcohol” (Lindberg Ale), the first we have handled, extremely fine and rare. van Dam CV $3,200.