Eisenstadt years of service tag

[5thwingmarty]

I picked this up recently because of its dual St. Louis connection and the unique Eisenstadt hallmark. I had not seen this particular hallmark before, and my first impression was that it might be an older one. In researching the Granite City Army Depot, I found the facility was opened in 1942 but did not actually get this name until 1962, so the oldest this tag could date to is 1962. The badge is just 5/8" in diameter.