(Music - Piano) Philippi's Patent Chromatic Piano Forte Key-Board. Illustrated ad design on cover showing Chromatic Piano Keyboard, franked with 1861, 1¢ blue (s.e. at right) tied by West Troy, N.Y. cds, with original illustrated circular; stamp with slight toning around perfs, otherwise Very Fine. Scott No. 63  Estimate $100 - 150. $0 (Image)