20 Yuan Central Bank of China

The Central Bank of China's 1941 issues were produced under considerable logistical strain — by this point Japan's occupation of much of coastal China had severed access to the established European and domestic printers the Nationalist government had long relied upon. Contracting the Security Banknote Company of Philadelphia was a practical wartime solution, part of a broader American-aided effort to keep Chongqing's monetary apparatus functioning.

The question mark on SBNC's date range in the record reflects genuine uncertainty about when the contract began — not all printing agreements from this period were formally documented in surviving archives.