Cross-country learning guide

Treaty-Port Silver Directory

Ports included only where a source identifies a monetary role for foreign dollars, customs, exchange, or merchant testing.

Port evidenceCustomsExchange centersRegional differences

Evidence-gated directory

Eight ports with explicit monetary relevance

International importance alone is not enough. Each row needs evidence for dollars, customs, exchange, or testing.

Treaty-port monetary directory
Port	Jurisdiction	Period	Coin types	Monetary evidence
Shanghai	Qing China	1843–1943 treaty-port era	Mexican dollar, Carolus dollar, sycee	Mexican and Carolus dollars could command premiums; customs used daily valuation.
Guangzhou / Canton	Qing China	1840s–1943 treaty-port era	Mexican dollar, trade dollars, sycee	Dollars circulated and customs valuations were proclaimed; values differed from Shanghai.
Shantou / Swatow	Qing China	1860–1943 treaty-port era	Mexican dollar, trade dollars	Contemporary reporting records Mexican-dollar and trade-dollar circulation.
Xiamen / Amoy	Qing China	1840s–1943 treaty-port era	Mexican dollar, trade dollars	Contemporary reporting records Mexican-dollar and trade-dollar circulation.
Fuzhou / Foochow	Qing China	1840s–1943 treaty-port era	Mexican dollar, trade dollars	Customs acceptance and official valuation were locally administered and changeable.
Ningbo / Ningpo	Qing China	1840s–1943 treaty-port era	Mexican dollar, Carolus dollar	Mexican dollars circulated; the trade-dollar position differed from southern ports.
Hong Kong	British Hong Kong	1841–1935 silver-standard era	Spanish dollar, Mexican dollar, Hong Kong dollar, sycee	Shroffs assayed silver and applied chops; the silver dollar became the monetary anchor.
Yokohama	Tokugawa / Meiji Japan	1859 onward	Mexican dollar, Ichibu-gin, Japanese silver yen	Official exchange and the short 改三分定 countermark episode are directly documented.

Source trail