Zaire. Set of 2,5 and 5 Zaires 1975, World Wildlife Conservation, Mountain Gorillas (Silver 38,61 mm, weight 28,28 g. .925) and Okapi (Silver 42 mm, weight 35 g. .925), KM 9, 10, mintage 6629 and 6431 pcs., Condition Proof, original box and certificates, Photo taken through the plastic in the cap