Zambia. Silver Proof Set of 5 and 10 Kwacha 1979, World Wildlife Conservation, African Longhorn (Silver 38,61 mm, weight 28,28 g. .925) and Taita Falcon (Silver 42 mm, weight 31,65 g. .925), KM 18, 19, Condition Proof, Bank of Zambia, original box and certificates, slight tarnish - patina, small spots, photo taken through the plastic in the cap