Canal Zone, Registration Envelope, 1918, 10¢ on 5c Black & Red on Cream, Narrow Surcharge, small size envelope to New York uprated with 1918, 2¢ vermilion & black and canceled by cork handstamps, reverse with "Ancon, C.Z., Feb 20, 1920" cds's, Very Fine, very scarce. UPSS No. RE1a. Scott No. UF1+53; $2,000  Estimate $1,000 - 1,500. $0 (Image)