What is it?

[SBPony]

Saw this on a racing forum. Guy says his son dug it up at his school in Asheville, NC. Have any ideas? He says it's not lead.
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[Greg Taylor]

The corroded Hat Token from an old Monopoly game?

 

[SBPony]

LOL

 

[SBPony]

Weighs in at 17 grams. ???

 

[diane]

Could it be a starburst button?

 

[SBPony]

Doesn't look to be perfectly round. Looks like the letter "e" on it also. Or maybe it's a stamp for the # "6"?