The stamp shows the following .....

1. The 7 O'clock ray flaw in the top right corner square.
2. A dot on the right side upright of the N of ONE
3. The bottom right corner square has been re-cut.
4. The side line is weak or broken just below the top right corner square .

     Note also .....

1. The extreame possitions of the check letters.
2. The square footed check letter J.