Jim - I think the word at the bottom is Jetton - indicating it is a token or marker. They were produced and used for many different purposes as replacements for actual coins. They are also referred to as Gaming tokens or Reckoning counters. Most are Brass. They were made is literally huge numbers in the last half of the 1700s and first half of the 1800s.
I don't own any catalogs that list varieties so I have no idea if you have a rare one or not.
I don't own any catalogs that list varieties so I have no idea if you have a rare one or not.

















