It is Chinese, but it isn't a "cleaver".
It is a basic Chinese kitchen knife used in most "Han" Chinese kitchens as their everything knife, oftentimes it is their only kitchen knife. To European eyes, these may have a western cleaver shape, but they are multifunctional kitchen knives. They are for slicing as much as for chopping of veggies to fish to meat as well as everything else I may have excluded.
This is a newer one as it has a one-piece integral grip cast with the blade.
Looks like someone used it to split wood or did some sort of battoning with it.
To the OP, this may disappoint your dreams of wealth, but there are probably a billion+ of these Chinese knives in the world. Clean it, sharpen it and use it in your kitchen.
