EXTREMELY FINE GEM. THIS IS WITHOUT QUESTION THE FINEST USED GUIDE LINE PAIR OF THE 4-CENT HORIZONTAL COIL, SCOTT 354, IN EXISTENCE. THIS MAGNIFICENT GUIDE LINE PAIR HAS BEEN GRADED SUPERB 98 BY P.S.E.
Johl notes that the 4c coil was used primarily for mailing advertising matter and so was not widely distributed. This also meant that not many were saved, and that very few multiples were used. The rarity of a guide line pair in this condition cannot be overstated -- the guide line only occurs after every 20 stamps, making it nine times as rare as a normal pair. For a guide line pair to receive this coveted grade both stamps must have wide and even margins, which is also orders of magnitude more difficult to find than just a single or even a regular pair.
With 1986 P.F. and 2009 P.S.E. certificates (Superb 98; unpriced in SMQ above the grade of 95, SMQ $12,500.00 as 95). This is the highest grade awarded to date and the only example to achieve this grade.