Xinjiang Red Cash Coin

Shown piece is value 5 Xinjiang red cash coin, issued by Aksu mint.

Shown piece is value 10 Xinjiang red cash coin, issued by Aksu mint.

Coin have unusualy treated edge. May be it was done to show fact of inflation reduction of it value from 10 standard cash to 5 standard cash (look below quote).

About the eighth year of reign of Emperor Dao Guang, Djengir rebelled against he Qing government in the south of Xinkiang. The Qing emperor sent large numbers of troops there to wipe out the rebels. To meet the fast-increasing need of the military forces, the Mint of Aksu began make 8^th year 5 and 8^th year 10 red cash in the eight year of Emperor Dao Guang's reign. Each red cash inscribed with 8^th year 10 was worth ten wen in standard cash, or equal to two wen in red cash. Therefore, it was still called T'ung Pao, meaning in Han current money or currency. An 8^th year 10 cash was only slightly bigger than an 8^th year 5 unit and ordinary red cash in size, though the latter was only worth 5 wen in standard cash or 1 wen in red cash. As it was a profitable undertaking to make 8^th year 10 red cash, most of the mint in South Xinkiang, one after another, hastened to follow the example of the Aksu Mint.