FINE AND EXCEEDINGLY RARE PLATE NUMBER BLOCK OF THE ONE-CENT PERF 10 UNWATERMARKED POSTAGE DUE ISSUE.
Generally, the 1c Unwatermarked Perf 10 is found with poor centering. Our review of major plate block and Postage Due auctions, including Chapin, Cole, Kobacker, Simon, Todd, and Wampler, revealed only two examples: the ex-Cole (and Drucker) plate block, and the ex-Wampler plate block, both of which are also hinged once at top with selvage reduced.
Of the few remaining plate blocks in existence, two have been broken for singles
VERY FINE. ONLY TWO CARDS OR COVERS ARE KNOWN AMONG THE THREE OR FOUR REPORTED EXAMPLES OF THE SHANGHAI FLAG MACHINE CANCEL.
Significantly, an example of the Shanghai machine cancel was absent from the Drucker collection.
EXTREMELY FINE. A BEAUTIFUL MINT NEVER-HINGED EXAMPLE OF THE $1.00 OFFICES IN CHINA ISSUE.
With 2003 P.F. certificate