Grid Patent Cancel, two strikes duplexed with "New-York Oct 25 1862" cds ties 1¢ blue (63), single and pair, on all-over gray Scientific American Patent Agency cover to Kensico N.Y.; reduced slightly at left, single 1¢ faulty, F.-V.F. Skinner-Eno No. PN-B 4  Estimate $200 - 300. $0 (Image)