Here is a used stamp and a cropped proof pair. The pair shows the "Q" flaw (Whitwrth's type 1b) to the right of the "C" flaw. The mark between the two stamps in lower margin can be found on either stamp depending on where the perforations are.
Another "C" flaw does exist. It shows two diagonal lines in the C. I have only found one copy shown below. This is Whitworth's flaw 14.
Posted 07/02/2016 11:01 am
