Esemplari della tipologia

Immagine 1 dell'esemplare di 1 Cash - Qianlong (Tongbao; Boo-yūn)
© Coinwalla (CC BY-SA)
Collezione privata
ND (1741-1794) – (en) Hartill# 22.338: V-shaped top of Yūn (Dongchuan Old mint)
25 mm • 3.4 g
Goes here: https://www.zeno.ru/showgallery.php?cat=12592 This is surface copper enrichment of a high-zinc brass issue. If you scratch the edge, you can get down to the yellow brass. You might have to scratch a bit deep.