PCGS Graded PR66DCAM – Sudan AH1398(1978) 10 Pounds Proof World Silver Coin. Sudan AH1398(1978) 10 Pounds Proof Silver Coin KM# 77 w/o Countermarks Summit Meeting Khartoum. A great looking scarce coin graded by PCGS at PR66DCAM, this is currently the only PCGS graded example of the coin. Follow us on our website, Instagram and Facebook!