Round ball with no sprue plate. About 69 caliber.
No slot cut for handles.
No numbers or name.
Drilled and tapped for two screws on diagonal corners of each block. What ever attaches would have to be a flat plate.
Appears to be fairly modern, not a vintage antique.
Pins are long, it has to fit flat, face to face, not on a hinged handle, and separated by pulling straight apart.
Ken