There are many designs of Capri Bells some brass some coin silver some sterling and some steel .
The one the Chinese company copied is this one below .I think they did a good job .
Once you have the patina on the bell you like use paste wax and buff it will make it look nicer
but will not disturb the patina it will also hold it at that point .
I saw a few on ebay that was sold for over £100 the other day that look like originals with the tarnish but could well be replicas. I happen to come across a website that sells identical replica bells all new and shiney and they compare exactly with the old looking ones on ebay.