No. It's a collar disc. They were first used in 1910. I think yours is a later version but would need a clearer picture to determine what period. Possibly circa WWII. I just had another thought, It could also be a rosette that was part of horse tack. Please post a picture of the back and a better one of the front. You might also want to put this in the "what is it" forum.
I'm thinking the same thing as Fire Fighter here on this piece being a Rosette off a horses bridal. The size and the lettering looks right. Congrat's on a great find.