Panama, 10c orange with "R Colon" and 3rd Colon Overprint, manuscript "415" number, registration stamp in pair with 10c yellow with 3rd Colon Overprint, tied by purple "Colon, 26 Ene 1904" duplex on Kee correspondence cover to San Francisco Cal., New York (2.2) and San Francisco (2.8) backstamps; minor edge wear and rounded corner, F.-V.F., a rare commercial use. Scott No. Panama F15 + 134  Estimate $300 - 400. $0 (Image)