I found this button at a local home that will be demolished soon. It was in a field next to the 1940's home. I wonder if it is a personal monogram or something else. Any thoughts?
Excellent information (and photos) on the versions of US Army collar-disc insignia, and time-dating them, is at the following webpage. Yours is show and identified near the top of the webpage. Dating Metallic Insignia: Collar Disks