In addition to the several known constant varieties of this pane issue, does anyone else have a position 91 (column 1, row 10) with a dark dot in the window.
This scan shows the location, but as an electron microscope was used to capture the image, the small dark spot appears as a darker red, whereas to the my naked eye it appears to be black.
I doubt that this is a constant variety, but I don't have any other position 91's to compare with. My other copies of this stamp do not have this much darker spot in this location.
