The bowl has indented letters and a stepped rim indicating a 1930 to mid 1931 production, but will run fine on all 4 years of production. It was bead blasted, passages cleaned and painted judging correct flat black gas proof paint.
1928-1931 Model A Ford Zenith Carbureator Venturi and Gasket Set
Model A Ford Zenith Carburetor by Holley Brass Throttle 1930 1931 Tested (K)
Model A Ford Zenith 1 Carburetor 1929 1930 Test Run Tested (J)
1930 1931 Model A Ford Zenith - 2 Carburetor OEM
ZENITH Carburetor Major Repair Kit Model A Ford 1926-1932 100% American Made
For Model A Ford 1926 1927 1928 1929 1932 Zenith New Carburetor Major Repair Kit