Bidspirit auction | United States - Modern Errors

United States - Modern Errors and Varieties - 1960, Water Conservation, 4c dark blue, brown orange and green, side margin horizontal strip of five, right stamp has brown orange missing due to extraneous paper over the design, full OG, NH, VF and very rare, according to the Scott Errors Cat. only four such errors known, C.v. $2,750, Est. $2,000-$2,500, Scott #1150a