ANGOLA. Banco Nacional Ultramarino. 50 Centavos, 1920 Issue. P-53. PMG Fine 12 Net. Edge Damage, Toned.A very rare 50 Centavos piece from the Porto Series found here in a Fine 12 condition from PMG. Mentioned in the comments section of the holder are Edge Damage, Toned. The note still shows exquisite detail, with the grade not being a deterrent of the notes collectability.