I guess technically they are Reales or Sols. This first one is my favorite. 1847 Central American Republic. I don't see these often at my local, so I snatched it up when I saw it.
I like the design of the C.A.R Sun-and-Mountains type. You are right, they do not show up often, and yours is a nice example.
This one is my favorite -- struck during the first half of the year when revolutionary forces of the Provincias Unidas del Río de la Plata captured Potosí. Royalists reasserted control later that same year and issued 8 reales with the bust of the Spanish monarch, Fernando VII.
bolivia 1865 melgarejo This is one of the south american crowns i kept after i decided to sell all others.