1 Cash - Wang Mang (Fifth reform; Blob at top of hole)

Issued in 14 CE during the brief Xin Dynasty, this 1 Cash coin represents the fifth and final currency reform enacted by the usurper emperor Wang Mang. Seeking to consolidate power and reform the Chinese economy, Wang Mang introduced a complex system of denominations that departed from the traditional bronze wuzhu coins. This specific variant is distinguished by the distinctive 'blob' or mark located at the top of the square center hole, a feature often attributed to the high-pressure casting techniques and strict quality control measures enforced during his reign.

The design of these coins reflects a period of intense experimentation and transition in numismatic history. Wang Mang utilized elegant seal script for the inscriptions, prioritizing aesthetic refinement as a means of legitimizing his rule. While his ambitious monetary policies ultimately failed and contributed to civil unrest, these coins remain significant artifacts today. They are studied for their metallurgical composition and the sophisticated calligraphy that has influenced East Asian numismatic design for centuries.