United States Stamps Featuring the "Nelson" Collection & The Dr. Larry C. Parks Collection of United States Postal Stationery

279a, 1938 3c Dark green and black, Perf 13x13½, bottom right corner margin block of 20 with imprint and plate no 1A, NH, some even toning and perf separations, a Fine and rare multiple (Scott $4,500 for hinged singles; SG 387a, £5,500 for NH singles) Sale 3054: Session 1 - British Commonwealth Stamps and Covers