1911年辛亥革命勝利後，清帝退位，中華民國成立，此時銅元仍繼續大量流通使用。1914年，銅元正式改稱「銅幣」，民國發行的銅幣與清最大的區別是龍紋被換成了由稻穗組成的嘉禾紋。雙旗幣鑄造於民國時期，1911年12月29日，經辛亥革命後，已光復的17省代表在南京推選孫中山為中華民國臨時大總統。1912年1月3日，中華民國政府宣告成立，清朝滅亡，孫中山頒令鑄造雙旗幣，以十文面值的為主，在全國大量發行以取代清朝銅元。
After the victory of the 1911 Revolution, the Emperor of Qing Dynasty abdicated and the Republic of China was founded. At that time, the copper yuan continued to circulate in large quantities. In 1914, the copper coin was officially renamed "copper coin". The biggest difference between the copper coin issued by the Republic of China and the Qing Dynasty was that the dragon pattern was replaced by the Jiahe grain composed of rice ears. The two flag coins were coined in the Republic of China. On December 29, 1911, after the 1911 Revolution, 17 provincial representatives who had recovered elected Sun Yat-sen as the interim president of the Republic of China in Nanjing. On January 3, 1912, the government of the Republic of China was founded and the Qing Dynasty perished. Sun Yat-sen issued a decree to coin double-flag coins, mainly in ten denominations, which were widely distributed throughout the country to replace the Qing Dynasty copper yuan.
孫中山先生指導武昌起義，推翻了滿清封建王朝，創建了民主政權--中華民國，其勳績無與倫比。孫中山是中國民主反動的偉大先驅者，被中國廣闊百姓稱之「國父」。民國十八年(1929年)，為籌發新國幣，決議採用孫中山先生的頭像為中國銀元之圖案，以留念「國父」。那時，也曾委託美國、奧天時、英國、日本、義大利等國的著名造幣廠辨別設計孫中山像帆船圖案一元銀幣，各廠均印鑄了試樣銀幣。
Sun Yat Sen led the Wuchang Uprising, overthrew the feudal dynasty of the Manchu Dynasty, and established a democratic regime, the Republic of China, with unparalleled achievements. Sun Yat-sen is a great pioneer of China's democratic reaction, known as the "father of the country" by the vast Chinese people. In the 18th year of the Republic of China (1929), in order to prepare and issue the new national currency, it was decided to adopt the image of Dr. Sun Yat Sen as the design of Chinese silver dollar to commemorate the "father of the country". At that time, the famous mints of the United States, Austria, Britain, Japan, Italy and other countries were entrusted to identify and design the silver coin with the design of Sun Yat-sen's sailboat pattern, and each factory printed and cast the sample silver coin.
1912年為了紀念中華民國成立，國決定鑄銀元紀念。1912年的國會選舉孫中山為第一領導人。鑄造的首批銀元以孫中山頭像為背景圖案。首鑄幣背面六角星，鏤空麥穗圍繞，也即是我們通常稱呼的孫小頭，這批銀元為首鑄的一批，發行有限，僅有40000枚，當年即被換購收藏一空。
In 1912, in order to commemorate the founding of the Republic of China, the state decided to cast silver dollar to commemorate. In 1912, the Congress elected Sun Yat-sen as the first leader. The first batch of silver coins were cast with Sun Yat-sen's head as the background pattern. On the back of the first coin, there are hexagons surrounded by hollow ears of wheat, that is, sun xiaotou, as we usually call them. This group of silver coins was the first group, with a limited number of issues, only 40000 of which were purchased and collected in the same year.
「民國十八年孫中山像地球壹圓幣」的銀質式樣幣，因鑄數極為無限，頗受中外錢幣喜好者的溺愛，不斷享有中國銀幣中的「大聲譽品」之美稱。中山先生指導武昌起義，推翻了滿清封建王朝，創建了民主政權--中華民國，其勳績無與倫比。孫中山是中國民主反動的偉大先驅者，被中國廣闊百姓稱之「國父」。民國十七年(1928)6月，在全國經濟會中，通過了《國幣條例草案》等有關幣制的議案，開始著手新幣制的籌劃。同時，決定停鑄北洋軍閥總頭目袁世凱像銀幣，改用中華民國締造者孫中山的肖像作為主幣圖案。在此背景下，湧現出一批以孫中山像為正面圖案的新國幣設計方案，十八年孫正面像地球版銀幣便是其中之一。
In the 18th year of the Republic of China, Sun Yat-sen's silver sample coin, like the earth one yuan coin, was favored by both Chinese and foreign coin lovers because of its infinite number of coins, and has constantly enjoyed the reputation of "loud reputation" in Chinese silver coins. Under the guidance of Mr. Zhongshan, Wuchang Uprising overthrew the feudal dynasty of the Manchu Dynasty and established the democratic regime, the Republic of China, with unparalleled achievements. Sun Yat-sen is a great pioneer of China's democratic reaction, known as the "father of the country" by the vast Chinese people. In June of the 17th year of the Republic of China (1928), in the national economic conference, bills on the national currency bill and other bills related to the currency system were passed, and the planning of the new currency system began. At the same time, it was decided to stop casting silver coins like Yuan Shikai, the general leader of the northern warlords, and use the portrait of Sun Yat Sen, the founder of the Republic of China, as the main coin pattern. In this context, a number of new national currency designs with Sun Yat-sen's image as the obverse design emerged, among which the silver coin with Sun Yat-sen's image as the earth version in the 18th year was one of them.
十八年孫像地球版銀幣，是民國十八年(1929)天津造幣廠出品。幣正面鑄孫中山胸像及紀年文字，背面中部為地球與雙旗圖案，近邊緣部環鑄英文「中華民國」及中文「壹圓」。地球、雙旗的構圖，意含中國傲立於世界之巔的意志，氣勢恢宏，寓意不凡。
In the 18th year, Sun Xiang earth silver coins were produced by Tianjin Mint in the 18th year of the Republic of China (1929). On the obverse, Sun Yat-sen's bust and chronological characters are engraved, on the middle of the reverse, the earth and double flags are engraved, and on the near margin, the English "Republic of China" and the Chinese "one circle" are engraved. The composition of the earth and the two flags means China's will to stand on the top of the world. It is magnificent and implies extraordinary.
專家評語：錢幣正面圈內為國父孫中山側面像圖案，中央環寫「中華民國十八年」七字，該幣背面圈內圖案鐫兩面交叉的國旗，左為鐵血十八星旗，右為五色旗，中間繫結帶，旗幟飄揚，雙旗上方有五角星裝飾，紋飾逼真，凹凸有致，栩栩如生，圈外英文環繞，圈外上環英文字樣。藏品幣面布局和諧，字體筆法流暢，紋飾刻制工細，包漿老道深厚，色澤古雅醇厚，審美風格獨特，文化內涵豐富，頗有藝術造詣，是不可多得的珍稀之品。幣面上的銹跡見證了其沉積的前史神韻與前史文明價值，使之平添了幾分古意古韻，透出民國時期深厚的文化底蘊，耐人尋味。此幣產生在混亂不安、煙火紛飛的民國時期，經過戰火的摧殘，能完整地保留下來的已為數不多，很是稀少，彌足珍貴。
Expert comments: the front circle of the coin is the side image of Sun Yat-sen, the father of the country, and the central circle is written with seven characters of "the 18th year of the Republic of China". The back circle of the coin is engraved with the national flag crossed on both sides, the left is the iron blood 18 star flag, the right is the five color flag, the middle is tied, the flag is flying, the two flags are decorated with five stars, the patterns are lifelike, concave and convex, lifelike, surrounded by English outside the circle, circle English words on the outside. The collection has a harmonious layout of coins, fluent writing style, fine decoration, deep and old way of wrapping pulp, elegant and mellow color, unique aesthetic style, rich cultural connotation and artistic attainments. It is a rare and rare product. The rust on the coin surface witnessed the pre history verve and pre history civilization value of its deposition, which added some ancient verve and revealed the profound cultural background of the Republic of China. This coin came into being in the period of the Republic of China, which was full of confusion and fireworks. After the destruction of war, there are few coins that can be completely preserved, which are rare and precious.
在目前的錢幣收藏市場上，民國時期的錢幣深得藏家喜愛。一是因為民國時期的錢幣有著濃厚的歷史薰陶，二是民國時期機制幣工藝的成熟，鑄幣技藝十分精湛，有著藝術價值。
In the current coin collecting market, the coins of the Republic of China were deeply loved by collectors. The first reason is that the coins of the Republic of China had a strong historical influence. The second reason is the maturity of the coin-making technology in the Republic of China. The coin-making technology is very exquisite and has artistic value.