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Trade dollar
Trade dollars are silver coins minted as trade coins by various countries to facilitate trade with China and the Orient. They all approximated in weight and fineness to the Spanish dollar, which had set the standard for a de facto common currency for trade in the Far East.
==History==
The existence of trade dollars came about because of the popularity of the silver Spanish dollar in China and East Asia. Following the establishment of the Spanish Philippines, Intramuros became an entrepôt for Chinese goods in one direction and silver, from across the Pacific to the Spanish held silver mines of Mexico, in the other. This so-called "Manila Galleons" trade route, led from the 16th Century onwards to the wide circulation of "pieces of eight" in East Asia.
The high regard in which these coins came to be held, led to the minting of the silver Chinese yuan, a coin designed to resemble the Spanish one. These Chinese "dragon dollars" not only circulated in China, but together with original coins of Spanish-Mexican origin became the preferred currency of trade between China and its neighbours. Defeated in the First Opium War China was forced to open its ports to foreign trade, and in the late half of the 19th Century Western nations trading with China found it cheaper and more expedient to mint their own coins, from their own supplies of silver, than to continue to use coins from Mexican sources. These so-called trade dollars would approximate in specification, weight 7 mace and 2 candareens (approx. 27.2 grams) and fineness .900 (90%), the Spanish-Mexican coins so long trusted and valued in China.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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