Panama, 1904, Registration, 10 on 20c red brown, purple handstamp surcharge, blue "3479" handstamp, used with Panama 1903-04 50c brown, blue Colon overprint, tied by purple flag duplexed with "Colon, 29 Jun 1904" cds on cover with printed address to Germany, blue crayon "50", reverse with New York (7.6) transit with New York registry label, blue Munich (7.15) arrival backstamp; tiny edge tear, Very Fine. Scott No. Panama F20 + 138  Estimate $500 - 750. THE ONLY RECORDED COVER BEARING THE 1903-04 50C BLUE COLON OVERPRINT ON PELURE PAPER. $0 (Image)

Panama, 1904, Registration, 10 on 20c red brown, purple handstamp surcharge, blue "4149" handstamp, used with Panama 1904 10c orange tied by purple flag duplexed with "Colon, 3 Ago 1904" cds on cover to San Francisco Cal., endorsed "Via New York", reverse with New York (8.10) transit and purple San Francisco (8.15) arrival backstamp, wax seal stain, otherwise Very Fine. Scott No. Panama F20 + 79  Estimate $400 - 600. $0 (Image)

Panama, 1904, Registration, 10 on 20c red brown, manuscript surcharge, manuscript "1028" number, used with Panama 1904 10c orange pair cancelled by purple target duplexed with "Colon, 1 Mar 1904" on cover with printed address to New York City, endorsed per "City of Washington", blue crayon "8", magenta New York (3.8) backstamp, blue crayon "8", light wax seal stain, otherwise Very Fine. Scott No. Panama F18 + 19  Estimate $400 - 600. $0 (Image)