Part 16: Incomplete Denominations
On the early copper issues, you will notice that the denomination is represented by a fraction, i.e.,
1/13, 1/26, or 1/52. When die filling is present, a coin's value could take on various values.
The only examples of this I have seen are given below.
The "normal" fraction 

Filled Die Varieties 
From an 1841 coin 

From another 1841 coin 

From an 1851 coin 

From an 1851 coin 

From an 1861 coin 

Return to Part Two: Thirteen Pence to a Shilling  Queen Victoria Copper Issues