1911年12月29 日，经辛亥革命后，已光复的17省代表在南京推选孙中山为中华民国临时大总统。1912年1月3日，中华民国政府宣告成立，清朝灭亡，在中国持续2000 多年的封建君主专制随之结束。民国成立时，由于币制尚未建立，除四川改铸大汉银币，福建改铸中华元宝外，主要的造币厂，大都仍沿用前清钢模铸造银币，以供流通需要。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，鼓铸1000万元纪念银币以为整顿。图案采用大总统孙中山肖像，以后的通用银币再改花纹式样。孙中山令财政部行文，同意鼓铸纪念币，并命令其余的通用银币新花纹，“中间应绘五谷模型，取丰岁足民之义，垂劝农务本之规”，训令财政部速制新模，分令各省造币厂照式鼓铸。不久，财政部就颁下新模给江南(南京)、湖北、广东等造币厂依式铸造，这就是“中华民国孙中山像开国纪念币”的由来。
孙中山头像中华民国开国纪念币银元，正面中央为孙中山侧面肖像，边缘内上镌中文隶书体“中华民国”4字、下镌“开国纪念币”5字、左右长枝花饰。背面中央为中文隶书体“壹圆”及嘉禾，边缘英文“中华民国”、“壹圆”，左右分列五角星(后改为六角星)。直线边齿，重26.6克，成色92%，俗称“小头”。该币作为中华民国国币发行。中华民国孙像开国纪念币银元，由于铸造厂家不一，铸造年代不同，雕刻师英语水平不高，除正背面主要图案未变外，其花饰细节、英文字母均有变异，特别是英文字母差错较多。这就形成了该币的多种版别。传世较广的主要有两种：一种是五角星版式，一种是六角星版式。
此款（错版15度）中华民国孙中山纪念币的精美表现的淋漓尽致，极具美感。具有较高的升值空间和收藏价值。中华民国纪念币发行量、错版币的存世量更加稀少，因而其收藏价值、市场价值都相对比较高，是十分罕见的上乘藏品。
On December 29, 1911, after the Revolution of 1911, 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 proclaimed and the Qing Dynasty perished. The feudal monarchy which lasted for more than 2000 years in China ended. At the time of the founding of the Republic of China, because the currency system had not yet been established, besides Sichuan and Fujian, the main coin factories still used the former Qing steel mould to cast silver coins for circulation. Due to currency confusion, Chen Jintao, Minister of Finance of the Interim Government, presented Sun Yat-sen, President of Wenda, on March 11, the first year of the Republic of China, to coin 10 million yuan of commemorative silver coins for rectification. The design is based on the portrait of Sun Yat-sen, the great president. Later, the general silver coins were changed into patterns. Sun Yat-sen ordered the Ministry of Finance to make commemorative coins, and ordered the other common silver coins to be coined with new patterns. "In the middle, we should draw five grain models, take the meaning of being rich and full of the people, and advocate the rules of the farming industry." He instructed the Ministry of Finance to make new models quickly, and ordered the provincial mints to do the same. Soon after, the Ministry of Finance issued a new model for the mints of Jiangnan (Nanjing), Hubei and Guangdong, which is the origin of "Sun Yat-sen of the Republic of China like the founding commemorative coin".
Sun Yat-sen's portrait is silver dollar, the founding commemorative coin of the Republic of China, with a side portrait of Sun Yat-sen in the center of the front, and the Chinese official script "Republic of China" engraved on the upper edge, "Founding Commemorative Coin" engraved on the lower edge, and left and right long branches decorated with flowers. On the back is the Chinese official script "One Circle" and Jiahe, and on the edge is the English "Republic of China" and "One Circle", with five-pointed stars (later changed to six-pointed stars) on the left and right. Straight side teeth, weighing 26.6 grams, with a fineness of 92%, commonly known as "small head". The currency is issued as the national currency of the Republic of China. Silver dollar, the founding commemorative coin of Sun Xiang of the Republic of China, is not good at English because of different foundries and casting years. Except for the main patterns on the front and back, there are variations in floral details and English letters, especially errors in English letters. This forms a variety of editions of the currency. There are two main styles that have been handed down widely: one is the five-pointed star format and the other is the hexagonal star format.
This commemorative coin of Sun Yat-sen of the Republic of China (15 degrees wrong edition) is exquisitely displayed and extremely beautiful. It has high appreciation space and collection value. The circulation of commemorative coins of the Republic of China and the existence of misprinted coins are even rarer, so their collection value and market value are relatively high, and they are very rare and excellent collections.
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