I found this in an old park.

[detectordave]

This park has given up some buffalo nickels, 2 gold rings, tons of clad and this thingie. Its about an inch thick and two inches long. Any ideas??

 

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[CRUSADER]

Its a Print Block - 100% sure, I can see the grove where it attached to the printing mechanism

 

[Gypsy Heart]

I think its part of a mold for jewelry making or embossing metal

 

[Peerless67]

its a decorative block usually around window frames on ornate buildings