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50 Centavos seal type II

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背面描述	Brown on yellow underprint. A central oval vignette renders an allegorical seated female figure turned toward a sailing ship at sea, executed in fine intaglio engraving. Ornate guilloche rosettes bearing the denomination "0$50" flank the vignette at left and right, with the bank name split across ribbon cartouches in the upper corners.
背面铭文	BANCO NACIONAL ULTRAMARINO 0$50 BRADBURY, WILKINSON & Co. 1os GRAVADORES, LONDRES. (Translation: National Bank Overseas 0$50 / Bradbury, Wilkinson & Co. Chief Engravers, London)
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备注	Banco Nacional Ultramarino issued this 50 Centavos note for circulation in Portuguese Guinea — one of several small-denomination fractional notes introduced during the First World War when metallic coinage effectively disappeared from West African colonial pockets. The "seal type II" designation marks a validation change applied to the series; the same printed sheets received different official overprints or cachets depending on the issuing authority's administrative decisions at the time of release. Bradbury Wilkinson's involvement places the physical production firmly in New Malden, Surrey — the firm's actual operating address despite the London association.