B213 (P69): 500 escudos (US$5.40) Green, yellow, and red. Front (vertical): Portuguese text; chemist Roberto Duarte Silva; chemical symbols; serpent wrapped around a chalice; mortar and pestle registration device; coat of arms. Back (vertical): Portuguese text; Trapiches – Ilha de Santo Antão (sugar cane press island of Santo Antão); mortarRead More…