(Medical) Seabury & Johnson, multicolored all-over design showing Award Medallions & Factory Scene on cover bearing 1890, 2¢ carmine tied by "New York Dec 29 '91" duplex with preprinted address to Boston, Mass., Very Fine and choice, Very Fine and choice. Scott No. 220  Estimate $500 - 750. $0 (Image)

(Medical) Seabury & Johnson, multicolored all-over illustrated design showing Factory View and Benson Plaster Products on cover bearing with 1898, 2¢ carmine tied by "New York, N.Y. May 28 '99" machine postmark, reverse with multicolored illustrated Benson Plaster Facsimile; slight edgewear, Very Fine and choice. Scott No. 279B  Estimate $600 - 800. $0 (Image)