Although of poor quality, all stamps on this block of 8 appear to have double prints on the right and bottom margins. The marks at the bottom seem to be a duplication of the peak line above CENT, plus the top portion of the numeral boxes, both shifted to the right.

For a better view, I have also included pics of a single stamp from this block, showing both face and gum sides. I am not familiar with the arch/leaf issue. Your comments would be appreciated.

