America NA over US Collar Disc - 1917-1918
A single piece, darkened copper collar disc to the WW1 US Forces. Worn on the right collar.
NA over US, so US National Army (draftee units), which was worn from 1917-1918.
Light wear, with some polishing to front.
To back is a thread post, with nut, which does NOT move. I sometimes find these with a washer to back as well, but this is absent.
No maker mark.