Brazil's shift to aluminium bronze for this type mid-series was a direct consequence of wartime metal shortages — the earlier nickel version was abandoned after the United States and Allied procurement programs created severe pressure on base metal supplies across South America. The 1943 date marks the transition year, with both compositions struck simultaneously before nickel was dropped entirely.
Brazil's shift to aluminium bronze for this type mid-series was a direct consequence of wartime metal shortages — the earlier nickel version was abandoned after the United States and Allied procurement programs created severe pressure on base metal supplies across South America. The 1943 date marks the transition year, with both compositions struck simultaneously before nickel was dropped entirely.