Examples of the type

Picture 1 of the example of 1 Cash - Kangxi (Tongbao; Boo-chiowan)
© Grinya (CC BY-NC-SA)
Private collection
ND (1662-1683) – (en) Seven stroke Bei; 1.4 Qian weight
4.2 g
Type A1, 1662-83. 1.4 mace weight standard; actual weight above 3.8 g.
https://www.zeno.ru/showgallery.php?cat=4308