What is it ?

[1942 merc]

Flat on the back with no marks . A magnet will not stick to it .

 

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[4x4x4]

....Looks to have a lanyard/loop hole at the top . . . ...

 

[1942 merc]

No hole in it . I thought maybe it came off a 70s 0r 80s metal toy like a transformer ? No attachment hole or molds anywhere on it .