According to an article on AllAfrica, the National Bank of Angola introduced a new polymer 500-kwanza note (B558a) on 17 September 2020. This joins the new 200-kwanza note (B557a) introduced on 30 July 2020, and will be followed by a new 1,000-kwanza note (B559a) in October and 2,000-kwanza note (B560a) in November.
B558 (PNL): 500 kwanzas (US$0.80)
Brown. Front: Portuguese text; António Agostinho Neto. Back: Portuguese text; Fenda da Tundavala (Tundavala Gap) viewpoint, Huíla province; coat of arms. No security thread. Watermark: None. Printer: (Giesecke & Devrient). 126 x 66 mm. Polymer (SafeGuard).
a. Abril de 2020. Sig. 16: Massano. Prefix A. Intro: 17.09.2020.
Courtesy of Andrea Bossi.