1973, Progress in Electronics, 11c multicolored, top right corner sheet margin plate No.34191 single with olive color completely omitted and vermilion color presented partly, full OG, NH, VF, PF certificate, C.v. $1,000 (Image)

1988, Igor Sikorsky, (36c) multicolored, red, dark blue and black (engraved) omitted, full OG, NH, VF and rare, a copy of PSE certificate for block of four, this being the top left stamp, a common stamp is included, C.v. $1,900 (Image)

2012, View of Lancaster County, PA, $1.05 multicolored, bottom left corner sheet margin plate No.S11111 vertical pair, die cutting omitted on front, perfect quality, backing paper intact, VF, C.v. $700 (Image)