Most everyone knows not to try to clean any type of coins etc. I have a friend living in Laguna Bacalar, MX. He is a diver and has a cache of treasure from the area. Swords, coin, cannon balls, silver bowls, jewlery...he has a B.A. in some type of Historian mapping degree????? He has some very very old maps. He is planning a trip soon on a large catamaran he is renovating to follow some maps he has from ships that sank on there chartered voyages. Really intersting man. The history of that area is amazing. He finds most his treasure after big storms, I am sure he is busy now.
Hope you can get him to come onto this forum thread and tell us about his finds. By the way, I was thinking about coins when I gave that advice about not cleaning what you find. I am not sure about how the "no cleaning rule" affects other kinds of ancient finds. Perhaps your friend could tell us.
Indiana
AmbergrisCaye.com 
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