The first is a 30-31 ford deluxe grill http://felton-delaware.olx.com/1931-ford-model-a-deluxe-roadster-iid-147935698 the second is a 34 chevy master deluxe grill
3rd and 4th look like 34-35 Chevy truck grills. Sedan grills weren't filled and had provisions for radiators caps