The shifts that take place in some of the printings between the two plates of this stamp are very interesting. There are three separate pages associated with the 20cLC issues in addition to this one: one dedicated to the issues. I also show a few specimens on cover, and a detailed study of the postal history of the 20cLC is left for the future. Below is a specimen the inner design shifted to significantly to the left.

Below is a specimen the inner design shifted to significantly to the right.

Below is a specimen the inner design shifted to significantly down.

Below is a specimen the inner design shifted to significantly down and to the right.

Below is a specimen the inner design shifted to significantly up.