1 Cash - Qianlong Tongbao, Boo-fu

The Fuzhou Board of Revenue facility was one of the more remote outposts in the Qing minting network, and its output under Qianlong was perpetually complicated by chronic copper shortages that plagued southern provincial mints throughout the mid-18th century. Beijing repeatedly adjusted the alloy ratios permitted at provincial facilities during this period, eventually sanctioning the shift toward higher zinc content — which is precisely what defines Boo-fu brass cash from this reign versus earlier issues.

Hartill 22.271 is among the more numerous Qianlong provincial types, but mint-fresh examples with sharp calligraphy are genuinely scarce given the 55-year production window and near-universal circulation of these low-denomination pieces.