Belt Strap of some Sort or Key Lock Outline.... I'm not sure.

[krednosreg45]

 

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[villagenut]

Garter buckle

 

[krednosreg45]

Okay cool! Found it near a site I've been going to a lot recently which was probably an old Military Camp from the early 1900's. The site is near the Arizona/ Mexican border where many troops were stationed near the Mexican Revolution...

 

[Tony in SC]

Could be a garter snap, but those were used on a lot of different strap things.

 

[villagenut]

Yes, snap is more correct than buckle, that could ruffle some guys feathers.

 

[TheCannonballGuy]

It appears to be an iron version of a garter-clasp, just shaped slightly differently from what you see in the circa-1900 advertizements below. Please note, the ad calls it a clasp, not a buckle or a snap. As the Boston Garter ad also shows, they were used by both men and women. Before the term "socks" came into use, the term was "stockings." (Our stockings were hung by the chimney with care, in hopes that Saint Nicholas soon would be there.) And millions of men wore these garters. Before elastic-fit socks came into being, you needed those garters to keep your socks from falling down around your shoe-tops.