TLDR: Download the coin here: https://www.thingiverse.com/thing:5904625 The Chinese used had shells well before 1,000 BCE as gifts, especially those bestowed upon the people from their aristocracy. Those were used in religious ceremonies and some hypothesize that imitation shells were used as a form of currency as far back as an estimated 700 BCE, around the time the bronze age ended in China. Knife money, or knife-shaped money began to be used in China in the centuries after 600 BCE. Spade money, or money that physically resembles a spade, began use some time after 640 BCE, which actually makes it far older than the stater, but it’s theorized they were used…