Scott #643 2c carmine rose Vermont Sesquicentennial issue commemorating the 150th anniversary of the Battle of Bennington.
The Battle of Bennington
was a battle of the American Revolutionary War, taking place on August 16, 1777, near Bennington, Vermont, but just across the border in Walloomsac, New York. The Green Mountain Boys were joined by Vermont, New Hampshire and Massachusetts militiamen and together they repelled a combined force of British Army troops, Brunswick (German) dragoons, Canadians and Native Americans.
Although Scott lists the color as carmine rose (a good example of this color for biokemist6
), stamps of this era are commonly referred to as the "two cent reds."
I agree your vertical pair grades F/VF with a natural straight edge on the left. This means that it came from the left edge of the pane, and so it is a position piece.