1E2
Here is a 1E3 stamp. I show detail of the overprint. Although I find irregularities in these, I am not yet ready to establish these variations as repeatable varieties.
1E4
Here is a 1E4 pair with the left stamp showing a break in the right outer line.
Here is a 1E4 specimen with some additional ink to the overprint.
This 1E4 specimen shows the selvage.
The 1E4 specimens are more common than the 1E2 and 1E3 specimens combined.