Silver Proof Set (4) (KM# 1-3, 4.1) 1969. Comprising 1 Riyal “Desert Fort”, 2 Riyals “President Richard Nixon”, 5 Riyals “Munich Olympics 1972”, 10 Riyals “Apollo XI (Fineness in oval at lower left, mintage figure 9564 at lower right)”. NGC Scratch Resistant Holders! Comes with Original Mint Case and Certificate of Authenticity.