used 6Kr. blue (Plate 1) horizontal strip of three with good to large margins, on fragment, lightly cancelled by open cogwheel h.s. Very fine. Signed Pfenninger. M.10; D.M. 1000. Photo
used 6Kr. blue (Plate 1) horizontal strip of three with good to large margins, on fragment, lightly cancelled by open cogwheel h.s. Very fine. Signed Pfenninger. M.10; D.M. 1000. Photo
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