FL023540 Your example of the Bust and Harp dated 1820 is a Contemporary Circulating Counterfeit of the original token. I believe it is the Cross LC-60E-1 variety with 10 strings on the harp. These copies were far cruder than the originals and made on thinner light weight planchets. There are many sub-varieties and they are made in brass and copper.
This is a LEGAL counterfeit and is a collectable variety.