If the stamp has no perforations (the stamp on the left) then click the numbers 10-17 on the left menu. If the stamp has perforations (the stamp on the right) then click the numbers 25-30A on the menu to the left. The stamp is somewhat common.

If it has no perforations then there is a 90% likelihood that it is number 11. If it has perforations it will be either 25, 26 or 26a. The difference between one number and the other is the color. They are all different shades of brown, some are plum in color, some err more towards orange-brown. Due to oxidization of the colors and fading in sunlight, it becomes difficult to discern one color from another.

The stamp on the left was often poorly cut at the post office. The value is quite dependent on how well it was cut. If you see the design clear of the edges on all four sides then you have a good stamp. If, on the other hand the stamp was cut a third of the way into the design, then the stamp will have less value.

A scarlet copy of this stamp was reprinted on hard white paper in 1875 and it can be found by clicking the numbers 40-47 on the menu to the left.