Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 734:
1945, black surcharge ”60” on Postage Due stamp of 6f brown red, watermark Double Cross on Pyramid (IX), surcharge type 5 under 36 degree angle, full OG, NH, VF and very rare, only 6 stamps were surcharged, stamp of type 5 (dot in ”sh” of ”Poshta”) is probably unique, Dr. Blaha’s expert sign, C.v. CZK148,000=US$6,450, Majer #U112a
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