This was a large crack in Plate 2 of the 1 cent 1851 and 1857. Imperforate #7 or perforated #20, both Type II. It's position number 13L2 and not flawless but w the large margin on the left you see more of the crack on this one than a normal #20 and the price was right..and BTW rarer on the perfed #20 than the imperf #7. And I'm sure Mr. Sinclair was in on this one :)...

Thought I'd post this little beauty....
Ray