I'm curious if this is a reproduction. I date it to 1821-1850, but this is clearly machine made and I don't see any like that on the reference site I'm using. It's also smaller than other cash coins I'm familiar with, smaller than a U.S. dime.
Looks like a replica to me. I thought only the last two Qing Emperors had machine-struck coinage as opposed to cast. Daoguang would be too old. Wikipedia has the first machine-struck cash coinage as under Guangxu, in 1889.
