Poland 1950 - Michel 617/19 Groszy overprints in very...

Extremely rare Michel 617/19 Groszy overprints in complete MNH Kleinbogen, certified by the (modern age) Groszy top specialist Krzysztof Ceremuga: "Genuine in all respects; mint never hinged with original gum, previously signed in margin by Gryzewski". Probably only a handful of (certified) Kleinbogen exist ... Will be shipped by registered mail (and full insurance).

Stima:€3,300

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