|CHINA-REPUBLIC 1929 Sun Yat Sen One Dollar Silver Pattern, Made in Italy with A.Motti, L&M91，K614a, KM-Pn 98, NGC MS63. From Champion June 1996 sale.
A PCGS SP63 sold in Stack's Bower Mar-15 sale for US $119,500
In 1929, the Chinese national government sought a replacement for the Yuan Shi-Kai and Sun Yat-Sen silver coins. They asked the national mints of America, Austria, England, Japan and Italy to engrave the dies. At last six types were made, but none was adopted. Some trial patterns were made in the Hangchow mint from these dies. All are rare, especially the Italian version with signature.
An example with United States design as obverse and 1932 gold standard bird junk as reverse in copper proof was donated to Shanghai Mint Museum in September 2010.