Panama, 1903, Registration, 10c on 20c brown red with first Panama rose overprint, blue "8218" handstamp, used with Panama 1903 20c violet with first Panama overprint, tied by "Panama, 30 Nov" duplex on Kee correspondence cover to San Francisco Cal., red crayon "83", New York (12.8) transit backstamp, Chinese docketing at right, Very Fine, a rare commercial use of Panama F6. Scott No. Panama F6 + 55  Estimate $1,000 - 1,500. $0 (Image)

Panama, 1903, Registration, 10c on 20c brown red with 2nd Panama overprint, blue "4768" handstamp, used with Panama 1903-04 2c rose pair and 20c violet with first Panama overprint, all tied by two strikes of "Panama, 29 Abr 1904" duplex on cover to Waltham, Mass., red crayon "4", New York (5.10) and Troy N.Y. (5.12) backstamps, blue "94673" handstamp ties registry stamp; light stains at left, Very Fine. Scott No. Panama F10 + 72 (2), 73  Estimate $1,000 - 1,500. ONE OF ONLY TWO RECORDED EXAMPLES OF THE PANAMA F10 REGISTRY STAMP ON COVER. Both recorded examples of this registry stamp used on cover are from the same sender used on Apr. 29th 1904, one to T.F. Harrington in Waltham, Mass. and the other to Frank Harrington in Troy N.Y. $0 (Image)

Panama, 1903, Registration, 10c on 20c brown red with 2nd Panama overprint, surcharge doubled, blue "4769" handstamp, used with Panama 1903-04 1c green pair, 5c blue and 10c orange, all tied by two strikes of "Panama, 29 Abr 1904" duplex on cover to Waltham, Mass., New York (5.10) and Waltham (5.11) backstamps; some extra gum, Very Fine. Scott No. Panama F10 + 71b (2), 78-79  Estimate $500 - 750. ONE OF ONLY TWO RECORDED EXAMPLES OF THE PANAMA F10 REGISTRY STAMP ON COVER, THIS BEING THE ONLY DOUBLE SURCHARGE KNOWN. Both recorded examples of this registry stamp used on cover are from the same sender used on Apr. 29th 1904, one to T.F. Harrington in Waltham, Mass. and the other to Frank Harrington in Troy N.Y. $0 (Image)

Panama, 1903, Registration, 10c on 20c brown red with Colon violet overprint, used with Panama 1903-04 A.R. 10c blue and 10c orange top part imprint strip of three with First Colon Overprint in purple and 1896 50c bister brown, all tied by purple "Colon, 24 Nov 1903" duplex on legal size cover to San Francisco Cal., F.-V.F. Scott No. Panama F16 + H17, 20, 104  Estimate $1,500 - 2,000. THE EARLIEST RECORDED USE OF THE COLON OVERPRINTED ISSUE ON COVER. ONE OF ONLY THREE RECORDED F16 COVERS. The Colon postmaster overprinted part of his stock of Colombian registration and A.R. stamps creating Scott Panama F16 and H17. $0 (Image)