1850 Baldwin & Co San Francisco $10 “Rider” coin

I recently ran across this coin in a bucket of old coins that belonged to my late uncle. How do you find out which ones are real and what is reproduction?
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I recently ran across this coin in a bucket of old coins that belonged to my late uncle. How do you find out which ones are real and what is reproduction?
Comments
Reproduction. Gold doesn't corrode
All comments reflect the opinion of the author, even when irrefutably accurate.
There are restrikes made from "white metal" also. Does tin corrode?
Edit- Either way its a reproduction/copy. I was actually just curious about the composition of "white metal" and I know you're a metallurgy guy.
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