Cast iron rings

[Icewing]

I found this in the yard of an old homestead. It has the number 76 embossed at the bottom of the middle ring. I'm guessing it's likely from some sort of horse tack, but so far I've been unable to find another example.

I'm just curious if anyone recognizes it, and what the 76 means?
(Year, part number, mold number, etc)

Thanks for your help.

 

[listerr]

I don't know, Icewing but it reminds me of what I found and posted the other day. Someone suggested barn tackle. I also found mine on an old homestead. Haven't brushed it off yet. Here is my thread link: http://www.treasurenet.com/forums/what/536545-weird-hunk-metal-what.html

 

[DirtyPockects]

Looks like the side of a horse bit