1, look at the color
Real silver dollars generally contain about 90% silver. The silver dollar containing this content is moist, white and soft, and has a strong luster after rust removal. Low silver dollar or fake silver dollar is dull, the silver dollar containing copper is reddish, the silver dollar containing brass is yellowish, the silver dollar containing white copper is slightly blue, the silver dollar containing lead is gray-black, and the silver dollar containing zinc is cyan.
2. Listen to the sound
The sound made by the real silver dollar after striking is pure, soft and calm. The fake silver dollar with high copper content makes a sharp sound after being struck, the fake silver dollar with full copper and silver plating makes a sharp and short sound, the fake silver dollar with high zinc content makes a crisp and loud sound, the fake silver dollar with copper or lead is dull, and the excavated silver dollar makes a dumb or "dumb version". But there are also some real silver dollars that have been burned out, cracked or suffered a lot. Therefore, you must be careful when listening to the sound.
3. Measure the quality
The specific gravity of silver is 10.5, which is lower than gold and platinum, but higher than other common metals such as copper, lead and zinc. Generally speaking, the weight of a seven-cent silver dollar in the statue of Kuping or Yuan Shikai in Guangxu Yuanbao and the commemorative coin of Sun Yat-sen in the Republic of China is between 25.5 grams and 27 grams, and the weight of one or two silver dollars is about 36.3 1 gram, and the error of the real silver dollar will not exceed 0.4 grams. Fake silver coins are doped with a lot of other metals, such as copper, lead and zinc. 127; Knowing the proportion of different metals, just compare the fake silver dollar with the real silver dollar with the same volume and weigh it gently with your finger, and you will find that the fake silver dollar is light and the real silver dollar is heavy. According to the balance, the fake silver dollar is 2 to 5 grams lighter than the real silver dollar. That is to say, the same volume ratio mass. Buy a higher resolution, at least 0.0 1 g.
"Chuanyang" silver dollar is the general name of the silver-based currency issued by Shanghai Central Mint for Nanjing government during the Republic of China. In the middle of the front pattern is the profile head of Dr. Sun Yat-sen, the forerunner of the democratic revolution, dressed in Hanfu, with the year of "Republic of China 2 1 year" on it. The pattern on the back is a picture of a dhow, with a Ji value of "one circle", a diameter of 3.94 cm, a weight of 26.7 g, a color of 88%, pure silver of 23.5 g, and a straight tooth edge on the outer ring. After the release of Chuanyang, together with Yuan Datou and Founding Commemorative Coin, it gradually replaced all kinds of Yang Long and foreign silver dollars circulating in the market. Until 1935, 1 1.3, the Kuomintang government implemented the legal monetary policy. ? In the 21st year of the Republic of China, the fate of "Chuanyang" silver dollar was dramatic. Before the September 18th Incident, the Kuomintang government issued a silver dollar for the 21st year of the Republic of China, with the head of Sun Yat-sen on the front and a sloop engraved on the back, with three birds and a rising sun on it, commonly known as "three birds", which means "national luck", "smooth sailing" and "rising sun". I didn't expect it to be released just now, which coincided with the "September 18th Incident". At that time, some people interpreted this design as the imminent rise of Japan, and it was said that three birds were flying in three northeastern provinces. So public opinion was in an uproar, accusing the Kuomintang government in succession. The Kuomintang government also thought that "the bird in the sky is the emblem of foreigners, superior to Chinese sailboats", so it ordered to take back this edition of silver dollar and send it back to the mint for melting to prevent rumors from circulating. In the 21st edition of the Republic of China, the total casting volume was 2.26 million pieces, but the actual circulation was less than 50,000 pieces. ? In addition to three kinds of "Chuanyang", there are several kinds of trial coins circulating in the world. 1929, in order to unify the formulation of national currency and silver dollar, the Ministry of Finance of the National Government asked foreign mint to provide foreign currency with Sun Yat-sen's image printed on the front and sailing pattern printed on the back. ? There are two kinds of sample coins provided by the United States: one is the profile of Sun Yat-sen, with a tiny English "A.Mott.Inc" on the upper edge of the left shoulder, and the words "18 years of the Republic of China" on the upper edge from right to left, and a picture of a three-masted sailboat in the middle of the back, with the words "one circle" on the left and right sides of the ship, and the water waves are very thick, and the English "R" is hidden in the water waves; Secondly, the patterns and characters on the front and back are the same as the first one, but there are no English words. ? There is only one version of the sample coin provided by Britain: the front is the profile of Sun Yat-sen, the head is carefully carved, the upper edge is the word "18 years of the Republic of China" from right to left, the strokes are exquisite, the center of the back is a picture of a three-masted sailboat releasing the ocean, and the words "one circle" are listed on the left and right sides respectively, and the water waves are carefully carved and peaceful. Other silver coins, after being cast by the Five Kingdoms Mint, are all cast in Hangzhou, Zhejiang Province, and the quantity is very small. There is little difference in other systems of the outboard version, except for the year, the central version and the reflux version, the ribbon version, the six-rope version, the olive tooth, the straight tooth and the high edge.
In fact, you usually buy big arc olive teeth at the beginning of playing, and the price is moderate.