Seeking Buckle Experts Opinions on These...

[Subterranean]

I found these buckles separately on my property and at another old homestead nearby. Any help with their approximate age or use (human, horse, or other) is greatly appreciated. Thanks, Subterranean.

 

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[BosnMate]

Look like harness buckles. The iron tongue isn't rusted away, that might help date them. When was the area last farmed with a team?

 

[traderoftreasures]

These are all horse harness related. Probably late 1800's early 1900's