Bidspirit auction | United States - Modern Errors

United States - Modern Errors and Varieties - 1975, Liberty Bell, 13c brown, booklet stamp in irregular block of ten, vertical pair imperforate between stamps on the right, additional incomplete pair at left, these error caused by a foldover (fold at the bottom left of the pair), full OG, NH, VF, only a few such errors exists, APEX certificate, C.v. $1,500, Est. $800-$900, Scott #1595a