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GERMANY-SCHLESWIG/SILESIA - 1920 NEVER HINGED MINT SPECIALIZED collection including definitives and ZONE 1 overprints, with at least 3 complete sets of the latter (Michel 15/28, including many pairs and strips of three with variety  shifted down cliche'. Also 50 stamps with defective cliches or overprint variety, all clearly identified. Interesting lot ideal for specialized research. (130+)