Wife's uncle retired before they closed.i am thinking mid 70's because of the 1776 reference and the whole Spirit of 76 theme everywhere back then, Fredrickson was motor carrier #1 in NC
I came across an original, new in the box, American made ETMF belt buckle in a truck trade last year. MY wife's uncle drove for them. I gave it to his daughter. She was over joyed & said she would pass it on to her son.