The parts book shows no certified speedo for 76 f-s, actually only two versions im my early printed 76 book, 100 mph and 200kmh neither inked with certified either so with all the other little indicators probably safe to say no 76, at least semi early.
I do have one other early 76 200 speedo and although a replacement its got the chrysler logo on it and says Chrysler Corporation, alot like the vin tag script but yet a little different color right above the odometer opening and was like that from the box. I will snap a pic, its odd.