Panama, Colombia 1900, Registration, 10c orange provisional with black "R", blue "2041" handstamp, used with Panama 1892 2c rose (16) tied by "Panama, 14 Mar 1900" duplex to local address, reverse with "Recomendados, Panama, 14 Mar 1900" cds; light creases, Very Fine. Scott No. Colombia F unlisted + Panama 16  Estimate $750 - 1,000. THE EARLIEST OF ONLY A FEW RECORDED MARCH 1900 PROVISIONAL "R" REGISTRATION STAMPS USED ON COVER. The supply of Columbian registration stamps was exhausted in March and resupply was impossible due to the Civil War. While a provisional registration stamp was being printed, a stock of the current 10c stamps were handstamped in red and black with a large "R". These are known used from March 14th to March 17th. $0 (Image)

Panama, Colombia 1900, Registration, 10c orange provisional with black "R", blue "2068" handstamp, used with Panama 1892 2c rose (16) tied by "Panama, 15 Mar 1900" duplex to local address, reverse with "Recomendados, Panama, 15 Mar 1900" cds; reduced at left, Very Fine. Scott No. Colombia F unlisted + Panama 16  Estimate $750 - 1,000. ONE OF ONLY A FEW RECORDED MARCH 1900 PROVISIONAL "R" REGISTRATION STAMPS USED ON COVER. $0 (Image)