Hello and welcome.

Your coin is, unfortunately, a modern replica. The reason the other side doesn't match up with anything you can find is that it's actually a "two-tailed mule" - the two sides are actually the reverses of two different coins.
Here is a 5 cash of 1925, from which the left pic was derived. The other side is based on a different denomination, a 40 cash, which apparently only comes in sand-cast versions:
example.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis