The stamp shows the following .....

1. The O flaw (stage 2).
2. A verticial guide line (wide) in the top right corner square.
3. A verticial guide line (close) in the bottom right corner square.
4. The check letter E is slightly doubled.

     In the second state .....

1. The O flaw (stage 2) is not present.
2. The top corner stars appear fainter.
3. The check letter E appears fainter.