Earliest Hammelman Cover?

Addressed to Mary P. Adams, a post office employee.

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I do not know the source of the above copy of the wrapper and its notes.
Notice the location of the strip of the eleven 10c coil stamps (Scott 356).

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Scott Value Information Watermark Date of Issue
354 4-cent Perf. 12 vert. Double line Feb. 23, 1909
355 5-cent Perf. 12 vert. Double line Feb. 23, 1909
356 10-cent Perf. 12 vert. Double line Jan. 7, 1909
351 5-cent Perf. 12 horiz. Double line Jan. 1909
348 1-cent Per. 12 horiz. Double line Dec. 29, 1908
349 2-cent Perf. 12 horiz. Double line Jan. 1909
385 1-cent Perf. 12 horiz. Single line Nov. 1, 1910
386 2-cent Perf. 12 horiz. Single line Nov. 1, 1910
352 1-cent Perf. 12 vert. Double line Jan. 1909
353 2-cent Perf. 12 vert. Double line Jan. 12, 1909
387 1-cent Perf. 12 vert. Single line Nov. 1, 1910
388 2-cent Perf. 12 vert. Single line Nov. 1, 1909