民国七十七年纪念蒋故总统经国先生半盎士精铸金币,NGC PF69 Ultra Cameo,唯一冠军分,十分罕见,#6489839-002。Taiwan, proof gold ½ oz medal, 1988, Remembrance of Chiang Ching-Kuo, portrait of Chiang Ching-Kuo on obverse, Chiang Kai Shek Memorial Hall on reverse, NGC PF 69 Ultra Cameo, Top Pop and the only one with this grade, very rare. Cert.# 6489839-002