old buckle identification

[Moe (fl)]

A few months ago, I found this buckle at the beach. It was encrusted and had corrosion. I was able to clean it (electrolysis) and preserve it. It looks like hand forged iron.

Any ideas of how old it may be and purpose?

Thanks for the replies.

-Moe

 

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[CRUSADER]

Looks like part of a bottle opener.