Lot 1861906, 1¢ blue green, imperf, vertical coil, pair with full leader strip attached at top, o.g., never hinged, choice centering, rich brilliant color and exceptional freshness, Extremely Fine, listed but unpriced in the Scott catalog; with 1972 and 2004 P.F. certificates.
Scott No. 314V Estimate $4,000 - 6,000.
THE UNIQUE EXAMPLE OF THE 1906 1¢ IMPERFORATE VERTICAL COIL BEARING A COIL LEADER STRIP.
A Scott catalog footnote states that the Philatelic Foundation has certified only this unique vertical coil and questions the existence of any of the other listed items as no other certified vertical coils are known.