Interior Dept., 1873, 1¢ vermilion. Strip of 3 tied by Washington, D.C. duplex cancels on a cover to Cambridge, Mass. with adhesive return address label from the Smithsonian Institution. Very clean and attractive, Very Fine. Scott No. O15  Estimate $300 - 400. $0 (Image)

Interior Dept., 1873, 1¢ vermilion. O.g., lower right corner margin single, beautifully centered with large margins and brilliant color, wonderfully fresh and Extremely Fine. Scott No. O15  $75. $0 (Image)

Interior Dept., 1873, 1¢ vermilion. Corner margin single, o.g., never hinged, fresh with rich radiant color, Very Fine, a lovely position single. Scott No. O15  $75 for o.g. $0 (Image)