Liberty cap?

[adaminnh]

Hi fellow hunters. Dug this one up last week. Its in poor condition but looks worse in photo. I can make out partial date and Im sure its a 1793. Problem is it only weighs 8 grams when some were minted at @14 grams and some at 10 grams. Can a coin lose that much weight? If it is what I think it is what would it be worth? My phone keeps turning the photos sideways...sorry.

 

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[cudamark]

What does the diameter measure?

 

[adaminnh]

Its about 29mm or an 1 1/8 inches.