You have the 1c Franklin from the years 1870-1879. It is quite common.

If the stamp has an embossed grill (shown below), then click on the numbers 134-144 on the menu to the left.

If the stamp has no grill then examine the large number one on the bottom of the stamp.

A crescent in the pearl or dot to the right of the number one identifies the later issues.

If you see that tiny crescent in the dot (shown below) then click on the numbers 182-191 on the menu to the left. If the stamp has a date cancel and you can see the date is prior to February 3rd, 1879 then click on the numbers 156-166 on the menu to the left. All unused stamps belong to the latter period of numbers 182-191.

If you do not see the tiny crescent (shown below) then click on the numbers 145-155 on the menu to the left.

Lastly if you see the shading above the head being almost solid (shown below) AND the color tends to be more of the greyish blue on the right stamp above AND you also see the tiny crescent on the pearl to the left of the number one, you have the 1882 printing by the American Bank Note Company. The value of these can be found by clicking the numbers 205-209 on the menu to the left.

Tiny crescent in the dot

An example of normal shading


An example of heavy shading above the head. If you see
this then you have the 1882 issue and this can be found
by clicking on the numbers 205-209 on the menu to the right.

An example of a grill

This stamp was reprinted in 1875 and it can be viewed by clicking on the numbers 167-177. These are all accounted for, so you will not own this.