1994年中国古代发明系列第三组精铸银币5元5枚一组，「首次发现彗星」、「船桅」、「蚕丝」、「龙骨车」及「编钟」，各重22克，总含银量80克（2.57盎司），附原盒及证书，均评NGC PF 69 Ultra Cameo，#6342452-039至#6342452-043。People s Republic Of China set of 5x silver proof 5 Yuan, 1994, Ancient Chinese Inventions and Discoveries Series III, Recording Of Comets , Crows Nest , Silken Fabric , Chain Water Pumps and Tuned Bells , each weigh 22g, total ASW 80g (2.57oz), with original box and certificate of issue, planned mintage 15,000, actual mintage 9,104,all graded NGC PF 69 Ultra Cameo, #6342452-039 to #6342452-043 (1 box of 5 coins).
