Nice find! I also have found a few dog licenses this year. The first 2 were bent together, 1950 made out of copper. The next one I found was a 1957 aluminum tag. These tags were found in my yard. I did'nt know they had dog tags back in the 50's. Also I should add is that I live out in the country so it was surprising that anyone even bought dog licenses for their dogs being that they lived out in the country on a farm.