EXTREMELY FINE GEM. A SUPERB MINT NEVER-HINGED GUIDE LINE PAIR OF THE 3-CENT SINGLE-LINE WATERMARK PERF 10 COIL, SCOTT 445.
According to Johl (p. 143) this issue was mainly used for special mailing purposes such as samples and pamphlets which were sent out in large quantities by individual mailers and resulted in limited distribution among collectors.
With 1992, 2001 P.F. and 2017 P.S.E. certificates (XF-Superb 95; SMQ $8,500.00), only three have graded higher (one at 95J and two at 98) and only one other shares this desirable grade.