Watch List notes:

WORLD COINS, CHINA Empire. Warring States. "Round Feet Spade Money", 475-221 BC. Chinese Character "Lin" for the name of the city where the coin was minted. Rev. Unverifiable Chinese character (probably "Shi", meaning ten) for the number stove that this coin was cast in. Good very fine, a small area of damage on the hilt of the coin, otherwise a really nice example for this old and rare ancient Chinese coin.
The city of Lin was part of Kingdom of Zhao at that time, and the kingdom was considered as one of the strongest powers at later Warring States period

Estimate: $ 600