Undenominated 'HENRIQUE E. N. SANTOS PHARMACEUTICO' label printed in reddish pink additionally inscribed 'MARCA REGISTRADA' and 'DERMOL BLENOL' (the latter in the central design with the HS Snake monogram) printed by the American Banknote Company with red 'SPECIMEN' overprints. Purpose is unknown but could be Revenue based. A fine block of four.