Large dot variety on the sheet of the 1p1E4-SO

This variety is found on the first stamp of the second row of the five by two repeatable grid used to populate the plate, yet interestingly, the variety only happens on the left half of the sheet with the exception of one case where I find it on the right side.

Row 2 Position 11





Row 4 Position 31





Row 6 Position 51





Row 8, right side Position 76





Row 10 Position 91