Bidspirit auction | United States
United States - 1973, Progress in Electronics, 8c multicolored, right margin single with tan (background) and lilac colors omitted, full OG, NH, VF, 50 stamps exist, C.v. $600, Est. $300-$400, Sc. #1501b
United States - 1973, Progress in Electronics, 8c multicolored, right margin single with tan (background) and lilac colors omitted, full OG, NH, VF, 50 stamps exist, C.v. $600, Est. $300-$400, Sc. #1501b