New Coin Enthusiast - Unknown Bronze/Copper Coin [Risolto]

Hello,
I have had this coin for the past 40 years or so and have never been able to figure out what it is. There are a few very faint numbers/letters.

It has a patina and looks like copper? underneath. I took several pictures under different lighting (same coin)

Does anyone have an idea of what coin this is? Thanks for much for any leads or help.

approx 17.5 grams weight
33.8mm across
2.7mm thickness

1 penny George III?
https://en.numista.com/catalogue/pieces12981.html

Agreed. A coin from UK around late 1790 to early 1800 area. I got this bulk lot which included a lot of them ...

Yours has III for George III on top right, and 1806 or 1807 date below.

​ For comparison with yours ...
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Thanks everyone for your help. That was quick identification on something that has vexed me for years!