This is the shield worn by the German Army on the tropical helmet rather common, a few prongs are broke off on the reverse
What you have there is the metal shield that attaches to the Troppenhelm( the tropical sun helmet), and it appears to be original
Damnnation Gel beat me to it
The guys have nailed it, an original piece as described. Leon.
"Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut." Ernest Hemingway