1912年民国成立后，孙中山就任中华民国临时大总统。由于币制尚未建立，晚晴机制铜元仍继续大量流通使用。由于币制混乱，临时政府财政部长陈锦涛，于民国元年3月11日呈文大总统孙中山发行的铜币与清朝最大的区别是龙纹被换成了由稻穗组成的嘉禾纹。各省铸造的铜元大多为两面叉的国旗图案，并有“开国纪念币”或“中华民国铜币”字样。

随后武昌和南京两处造币厂率先铸行了 “中华民国开国纪念币”铜元辅币，以十文面值的为主，在全国发行以取代清朝铜元。这就是“中华民国开国纪念币” 铜元的由来，因为币面都有‘双旗图案’故俗称“双旗币”。因为钱币分为中央和地方铸造和不通刻板，其版别也极其复杂。

图中藏品是一个“大圆国”版双旗币，该币为机制铜元，钱币正面两面旗帜交叉而立，左为十八星旗，右为五色旗，旗后系有缨带，灵动飘逸，双旗寓意全国一统与民族大团结;上缘为“中华民国”四字，下缘铸“开国纪念币”五字，左右两侧分列长枝花卉。背面中央珠圈内铸“十文”字样，两边有禾穗、莲叶纹盘绕，寓意丰民足岁;珠圈外铸有英文面值和国别。这些特点与一般双旗币没有明显区别。“大圆国”版双旗币与一般双旗币的区别;民国开国纪念铜币十文的字体为隶书大字，笔划粗圆，不似一般的隶书那般清秀，国字为大圆框俗称“大圆国”，正面无圈，面双圈，小麦穗，珠圈外三点星。近几年随着广泛收藏爱好者的喜爱和追捧，清末年间的古币在国内市场的成交量也随之上升，民国年间的钱币也成稳定趋势在逐渐升高，从而创造出一个又一个的传奇故事。

After the founding of the Republic of China in 1912, Sun Yat-sen became the interim president of the Republic of China. Since the currency system has not yet been established, the late Qing mechanism copper yuan continues to circulate in large quantities. Due to the chaos of the currency system, the Minister of Finance of the Provisional Government Chen Jintao submitted a letter on March 11, the first year of the Republic of China, that the copper coin issued by the President Sun Yat-sen and the Qing Dynasty is the biggest difference between the dragon pattern and the golden grain made of rice ears. Most of the copper coins minted in various provinces are double-sided crossed national flag patterns, and have the words "Founding Commemorative Coin" or "Republic of China Copper Coin".

Subsequently, the two mints in Wuchang and Nanjing took the lead in coining the "commemorative coin for the founding of the Republic of China" copper yuan coins, mainly in ten denominations, and issued nationwide to replace the Qing Dynasty copper yuan. This is the origin of the "commemorative coin for the founding of the Republic of China" copper yuan, because the currency has a "double flag pattern" so it is commonly called "double flag coin". Because the coins are divided into central and local minting and different and rigid, their versions are also extremely complicated.

The collection in the picture is a double-flag coin of the "Great Yuan Country" version. The coin is a machine-made copper dollar. The two flags on the front of the coin are crossed. The eighteen-star flag is on the left and the five-color flag is on the right. There is a tasseled band behind the flag, which is flexible and elegant. The flag symbolizes national unity and national unity; the upper edge is the four characters "Republic of China", the lower edge is cast with the five characters "commemorative coin for the founding of the nation", and there are long branches of flowers on the left and right sides. The words "Ten Wen" are cast in the central bead ring on the back, with grains of grass and lotus leaves coiled on both sides, implying the prosperity of the people; the English face value and country are cast outside the bead ring. These characteristics are not significantly different from the general double flag coins. The difference between the "Dayuanguo" version of the double flag coin and the ordinary double flag coin; the font of the ten-character commemorative copper coin for the founding of the Republic of China is the official script, the strokes are thick and round, unlike the ordinary official script, the national character is a big round frame, commonly known as "大圆国" , No circle on the front, double circle on the face, wheat ears, three stars outside the bead circle. In recent years, with the love and pursuit of a wide range of collectors, the volume of ancient coins in the domestic market in the late Qing Dynasty has also increased, and the coins in the Republic of China have also become a stable trend and gradually increased, thus creating one after another. legend.