I've got a few coins from countries located in the Caribbean: Bahamas, Barbados, Cayman Islands, etc. Mostly large (some commemorative) ones from the 1970's when Franklin Mint was minting them. There's probably some history to that I am unaware of. Anyway, according to Standard Catalog some coins were design wise and size wise identical between silver (80%-92.5%) and cu-ni compositions. I'm wondering how to tell if what I have is silver or not as well as when I buy in the future. Here's an example.
I have Barbados Five Dollar coins dated 1973, 1975, 1976. As far as I understand 1976 is available as silver and clad. I think I have the silver kind. That's how it was sold to me. Coins have identical design according to the Catalog. But there might be differences in weight, look, something else. I am speculating. Anyone have any tips/thoughts? Thanks in advance.