EXTREMELY FINE MINT NEVER-HINGED GUIDE LINE PAIR OF THE 2-CENT PERF 12 DOUBLE-LINE WATERMARK HORIZONTAL COIL.
According to Johl (Vol. 1, p. 108), "When the stamps were current, coils were still in small favor with philatelists and as this sidewise type was more popular with users of affixing machines fewer were saved than the endwise coil."
With 2017 P.S.E. certificate (VF-XF 85; SMQ $2,600.00). This is a very challenging line pair to find in Mint N.H. centered condition. Only two have been graded higher by P.S.E. (both XF 90).