Mystery Disc..

[MuckyBottles]

I found this disc when I was scouting my new location, I initially thought it was a coin, but its much bigger. I took DFX Daves advice and zapped it to pull of the rust....any ideas?
When I first found it..


With a little zappage...


Compared to one of my large cent's

 

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[coachbedford]

If I didn't know better I'd say it was a Roman sestertius...but that wouldn't make sense for a US (I assume??) find. Other options given its size... bronze medal, 1797 british cartwheel 2 pence, MAYBE 1806-7 British penny since those were pretty big (but not sure they were THAT big), or a really big 18th to 19th copper token -- US, British, maybe French

 

[Kevo_DFX]

If I didn't know better I'd say it was a Roman sestertius...but that wouldn't make sense for a US (I assume??) find. Other options given its size... bronze medal, 1797 british cartwheel 2 pence, MAYBE 1806-7 British penny since those were pretty big (but not sure they were THAT big), or a really big 18th to 19th copper token -- US, British, maybe French

We could rule out or verify each one of these suggestions and perhaps millions more if the OP could provide the diameter and weight of the disc.

 

[cudamark]

If it had/has rust, it pretty much rules out a coin. Evaporust time!

 

[Frankyg]

It could be a George 3rd 'Cartwheel' penny. They weighed 1 OZ or 28.3 grammes and had a diameter of 36mm. If it is then it is dated around 1798.

 

[Tony in SC]

Freeze Plug. Tony

 

[Charlie P. (NY)]

Does it stick to a magnet?