100 Cash - Chunyou Tongbao, small size

The Chunyou Tongbao series was issued under Emperor Lizong of the Southern Song dynasty, whose reign was increasingly defined by military pressure from the Mongols advancing under Ögedei Khan and later Möngke Khan. Large-denomination cash coins of this period reflect the dynasty's chronic fiscal strain — the Southern Song relied heavily on paper money, and bronze issues were often minted to shore up confidence in a currency system already showing serious cracks.

The "small size" designation within the 100-cash type distinguishes this from larger module variants catalogued separately by Hartill. Schjoth 1022 is among the more frequently encountered references for the type, though genuine Song-period examples still require careful scrutiny against later cast imitations.