From 1990 Proof Krugerrand were supplied in Plastic capsules. The Krugerrand Proofs were released as individual 1 ounce Proof Krugerrand, 1990 1/2 ounce Proof Krugerrand in SAM Cases and the 1/4 ounce Proof Krugerrand and 1/10 ounce Proof Krugerrand were issued together in what was known as a pair SAM case. See GRC for Gold Reef City Proof Krugerrand.