Worldwide Rare Stamps and Postal History
Lot 1431:
1921, trial blue surcharge 20,000r on 7r black and yellow, printed on vertically laid paper, top left corner sheet margin block of four with control text ”A 04 B” in black, additional surcharges on selvage, full OG, NH (hinged on margin far away from the stamps), VF and probably unique multiple, only one sheet of 25 stamps with blue surcharge had been produced, each one with Romeko guarantee hs, Sc. #235
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