There are far more fake coins of this type than genuine these days. Most are simple tourist copies rather than numismatic forgeries--yours are far too legible to be the real deal. Genuine knife and Spade coins go for $50 up to thousands of dollars.
I think all except the knife coin are supposed to be coins from Wang Mang (7-23 AD if memory serves)--an eccentric "visionary" who attempted to reform China to its pre-Warring States glory, one facet of which was to introduce over 40 new types of coins in arbitrary denominations to an economy that was built on only a single denomination. You had to be literate to understand the denominations, which meant that most of the population were utterly confused and lost.
I think all except the knife coin are supposed to be coins from Wang Mang (7-23 AD if memory serves)--an eccentric "visionary" who attempted to reform China to its pre-Warring States glory, one facet of which was to introduce over 40 new types of coins in arbitrary denominations to an economy that was built on only a single denomination. You had to be literate to understand the denominations, which meant that most of the population were utterly confused and lost.



















