1879年-A法兰西联邦加厚版试作币。巴黎铸币厂。极其稀罕,据称已知存世者仅2枚。黄铜铸,深打,诱人虹彩,双面透出些许原光,赏心悦目。NGC PROOF-63.FRENCH COCHIN CHINA. Centime Piefort Essai, 1879-A. Paris Mint. NGC PROOF-63.KM-PE2; Lec-11a (this coin); Gad-4. EXTREMELY RARE, reportedly only 2 examples known. Struck in brass. Sharply struck with lovely iridescent tone and traces of mint luster on both sides and excellent eye appeal.