5c Carmine, Error (467).
Single error in block of six, tied by "Bergenfield N.J. Dec. 31, 1918"
duplex on cover addressed locally, some slight toning along flapsVERY FINE. FEWER THAN TEN EXAMPLES OF THIS ERROR ARE KNOWN ON COVER. A WONDERFUL RARITY.
In an article published in the B.I.A. in September 1984, Larry Weiss records only eight covers bearing the 5c Carmine Perf 10 error. Of these eight, two were used significantly later, in 1936. This is the last of the contemporary (1917-1918) usages.
With 1988 P.S.E. certificate (Image)
5c Carmine, Error (467).
Single error in block of nine, natural s.e. at top, brilliant color, neat
strikes of oval cancels, Fine and choice, scarce used block (Image) 
5c Carmine, Error (467).
Double error in block of twelve, natural s.e. at bottom, deep rich color,
neat strikes of oval cancels, Fine and scarce used block, with 1999 P.F.
certificate (Image)
5c Carmine, Error (467).
In pair with normal 2c stamp, rich color, light strike of registry oval
cancel, Extremely Fine (Image)