George, From the "Coat of Arms" insignia, in the center of the hubcap, and "The General" script above it, is was the trademark, of the General Tire Co.... I am not sure when this trademark was introduced, but these are the first full wheel covers, that I have ever seen, for the General Tire Co. It's my guess, that these wheels & hubcaps, could have have been introduced around 1930, or a little after... The only identifying stamping on the wheel, is: CHEVROLET, in the outer bolt hole areal.... Now, to make things a little more difficult to figure out, there were numerous car manufactures, with only certain models, that the wheels had 6 holes, with a 5 1/2" center to center bolt pattern, made in the U.S. & Canada. These wheels being for 14" tires, and 6 5/8" tire width, is where it's I am not sure, of who made the wheels and when.... In 1932, The General Tire Co. along with the Cleveland Welding Co., started making wheels (rib type, rather than a solid or spoke), and with a smaller hubcap, with the General Tire Co. logo...On the wheel, they had a 3 digit code, a year, mfg. name of the Clev-Weld Co., and patent. pend. They began with wheel tire size was 16", with the tire width of 4 1/2", and in 1933, they went to 15", with the early ones being 6 1/4" and the latter being 6 5/8" , in 1934 and beyond , they went to 14".... I can only conclude, that the General Tire Co., changed wheel & hubcap manufactures, before 1932... If anyone has any photos, advertisements, of these wheels, I sure would like to get a copy, if possible... And if anyone can add to what I have said, or correct what I have said, I would appreciate that also... What I have said here, is only what I have observed, over the last few years....