OEM 1975 Bronco Grill - markings?

[tlyoung003]

How can I be sure I have an OEM 1975 Bronco Grill versus aftermarket? Are there markings I should see and if yes, where are they located. Thank you

 

[EPB72]

Mine had a date stamp or what appeared to be ,, I dont remember exactly where but it was inder one of the headlight trim rings, the date coincided with the production date.. .. when you hand strip/ clean everything sometimes you find stampings ,logoes ,especialy on the bolt on parts,,