Slesvig - Official stamps, C double sharp overprint set 1920, all 14 items complete wonderful fresh colors and excellent perforated on cover the plebiscite commission, neat and clear used “Flensburg 10. 2. 20”. An outstanding set this scarce issue for great demands! Certificate with photograph Gruber BPP.
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Slesvig - Official stamps, C double sharp overprint set 1920, all 14 items complete wonderful fresh colors and excellent perforated on cover the plebiscite commission, neat and clear used “Flensburg 10. 2. 20”. An outstanding set this scarce issue for great demands! Certificate with photograph Gruber BPP.

Source: philasearch.com