What is it!. 31 button, coin or bag seal?

[BlippityBleep]

This was found in the NJ coast. Grey in color, heavy-ish and feels like lead. Rang up around a 18 on a nox800. A friend thought it was a 31st regiment button but the fonts don't look the same. If anyone has and ideas what this is - its size is about a nickel.

 

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[pepperj]

Lead seal

 

[Tpmetal]

yup lead seal is my vote as well

 

[BlippityBleep]

Thanks! I have a followup. Is there a resource that would tell me what 31 stands for? I searched but didn't see anything like my seal.

 

[Tony in SC]

Kinda looks like a power pole or cross tie tag?