SAN MARINO. 20 & 50 Euro, 2002-R. NGC PROOF-70 ULTRA CAMEO.Fr-89/90; KM-460/461. 2 pieces in lot. Each coin has a mintage of only 4,510 pieces. A flawless pair, struck to commemorate the 1,600th anniversary of Ravenna, a city which served as the capital of the Western Roman Empire from 402 until the empires collapse in 476. Combined AGW: .6534 ounce.NGC PROOF-70 ULTRA CAMEO (2).