Whether you want to buy this piece for your collection, estate, investor portfolio or as a special treasure for someone else – here are the specifications. Olympic series: this 18 gram Chinese coin struck from 70% copper has a limited edition of just 2500 pieces worldwide. It comes to you in gem proof condition as released by the China Mint in 1980.We are available to assist you with any questions on this or other Chinese coins. Our unique expertise and experience in Chinese numismatics covers modern, imperial, republic and circulating coins. We pride ourselves in servicing our clientele to work in building special collections or locate key date coins with help from our global network and have done so since 2004. In addition, we are frequently top bidders on coins and collections when looking to divest.