Panama, 1903-04, Registration, 10c on 20c blue on blue with First Panama Overprint, blue "757" handstamp, used with 1904, 10c yellow with Fourth Panama Overprint, tied by "Panama 21 Jan 1904" duplex on cover with preprinted address to Italy, endorsed via London, reverse with London (2.11) and Naples backstamps; central vertical fold doesn't affect stamp, otherwise Very Fine. Scott No. Panama F9 + 79  Estimate $300 - 400. $0 (Image)

Panama, 1903-04, Registration, 10c on 20c blue on blue with First Panama Overprint, blue "2523" handstamp, used with A.R. 5c on 10c blue with First Panama Overprint in rose, 10c yellow strip of three with Fourth Panama Overprint, tied by "Panama 7 Mar 1904" duplex on cover to Havana, Cuba, New York (3.15) transit backstamp; gum stain, F.-V.F. Scott No. Panama F9 + H10, 79 (3)  Estimate $300 - 400. $0 (Image)