Those can date back to the 1600 & 1700's. And minted up to the 1910s, if I recall. And yours appears to be of the earlier type since it has only two characters on one side (as opposed to 4 on both sides, which are later types). They go in "dynasties" (of 30 to 70 yrs. or whatever), so you can never pin down an exact year. They are all worthless. And the fact of older ones (1600s & 1700's) have utterly no bearing on when the were lost/circulated.
Apparently they were stored in barrels in China, and broken out for long-term travel or whatever. So the age of minting has no bearing whatsoever on when they were lost. They turn up en-masse ANYWHERE the Chinese immigrants (RR workers, mine workers, ag. workers. etc...) came in. For example, they are a dime a dozen (even the 1600 & 1700's types) in China town districts of the CA gold rush camps. And RR coolie worker camps. And "china town" districts of west coast cities.
Fun to find. But unfortunately of no value, nor any indication of when they were lost (other than perhaps before 1920-ish).