50c Columbian (240). Mint
N.H., intense shade nicely contrasted by bright paperEXTREMELY FINE MINT NEVER-HINGED EXAMPLE OF THE 50-CENT COLUMBIAN.
With 2000 P.F. certificate (Image)
50c Columbian (240).
Original gum, lightly hinged, choice centering, deep shade on fresh paper,
Extremely Fine, with 1994 P.S.E. certificate for block
(Image) 
50c Columbian (240).
Original gum, lightly hinged, rich color, well-centered, Extremely Fine (Image) 
50c Columbian (240).
Slightly disturbed original gum, with small adherences on gum,
well-centered with wide margins, tiny corner crease, otherwise Extremely
Fine (Image) 
50c Columbian (240).
Original gum, lightly hinged, rich color, Fine, with 2000 P.F. certificate
(Image)
50c Columbian (240). Block
of four, bottom right stamp Mint N.H., others original gum, rich color,
bottom left stamp small gum thin, otherwise Fine-Very Fine block, Scott
Retail as singles (Image)
50c Columbian (240). Block
of four, rich color, light registry oval cancel, some faint scuffs,
otherwise Fine-Very Fine, a scarce used block
(Image)