✅ SOLVED Machine Part, for....??

[tmac20]

Well, I finally got out to do some spring detecting and found this hefty little machine part. It's 4"L x 1.5"H and .75"W and has a greenish tint to it.
I'm stumped, but my guess is that is has something to with printing press?, but have no clue.
I bet someone will know right away what this is... Thanks for looking!

 

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[DCMatt]

Part of a lock/latch ?

Tony is on the mark. A part from a mortise lock/latch.

 

[Tony in SC]

Part of a lock/latch ?

 

[tmac20]

Tony is on the mark. A part from a mortise lock/latch.

You guys are good! I'd say case is closed. I'll have to go back and see what else I can find.
Thanks!