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Auction: 20034 - The Doyen Collection
Lot: 1561

(x) Switzerland
1933-37 Air
50c. black and red variety imperforate, unmounted mint with light tone spots at the top, showing ever so slightly at the front. One from only two sheets of twenty-five. Briefmarkenprüfstelle Certificate (2005). Zum. 9z. 1.09, CHF6,500

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Sold for
£950

Starting price
£550