Da Guan Tong Bao // Blank. 30mm, 5.10 grams. Hartill #19.7.

From an old US collection.

These coins, in various styles and in extremely variable quality, are thought to have been cast by the Mongols after their conquest of the Jin Kingdom (and their introduction to cast coinage), but before their conquest of China and establishment of the Yuan dynasty. This is a medium-sized example, worth either 2- or 3-cash.