Tag ID help please!

[dragonsoldier]

Found this while detecting around a local park. I haven't a clue what it may have been used for. Please help! It was about 6"-8" deep.

 

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[dragonsoldier]

Sorry for the upside down pic, I can rotate it if needed, I was in a hurry.

 

[sandchip]

How big is it?

 

[dragonsoldier]

It's about the size of the palm of my hand probably 4"x4"

 

[dragonsoldier]

Here's a better comparison.