From your description, I strongly suspect what you have is a "Disney replica" of a 1736 Spanish-colonial gold coin. The 1736 date is particularly common, and the "3" is often very narrow, kind of looking like a bent "1". And replica "pirate doubloons" are much more likely to be found in a random inheritance than genuine gold coins.
This would be my assumption, until pictures of your actual item are forthcoming.
Waste no more time arguing what a good man should be. Be one. Roman emperor Marcus Aurelius, "Meditations"
Answers
First thing you need to do is determine if they're authentic.
Pictures are required!
From your description, I strongly suspect what you have is a "Disney replica" of a 1736 Spanish-colonial gold coin. The 1736 date is particularly common, and the "3" is often very narrow, kind of looking like a bent "1". And replica "pirate doubloons" are much more likely to be found in a random inheritance than genuine gold coins.
This would be my assumption, until pictures of your actual item are forthcoming.
Roman emperor Marcus Aurelius, "Meditations"
Apparently I have been awarded one DPOTD.