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 2017 P.S.E. certificate (XF-Superb 95; SMQ $8,500.00). Only two have graded higher (at 95J and 98, offered in Siegel Sales 1010 and 1014) and one other shares this desirable grade.