Banco Nacional Ultramarino occupied an unusual position in Portuguese finance — it held the note-issuing monopoly not for metropolitan Portugal but for the overseas territories, a mandate originally granted in 1864 that gave the bank remarkable autonomy across a scattered colonial empire. This 1906 issue would have circulated in one of those territories, with the specific destination determined by overprint or branch designation rather than the base design itself.
The embossed seal was a deliberate anti-counterfeiting measure at a time when lithographic forgery of colonial notes was a genuine concern in lower-denomination series. Worth checking which territory's branch authorized this particular example.
Banco Nacional Ultramarino occupied an unusual position in Portuguese finance — it held the note-issuing monopoly not for metropolitan Portugal but for the overseas territories, a mandate originally granted in 1864 that gave the bank remarkable autonomy across a scattered colonial empire. This 1906 issue would have circulated in one of those territories, with the specific destination determined by overprint or branch designation rather than the base design itself.
The embossed seal was a deliberate anti-counterfeiting measure at a time when lithographic forgery of colonial notes was a genuine concern in lower-denomination series. Worth checking which territory's branch authorized this particular example.