Rare WWI USMC EM Right Collar Disc in Longitude and Latitude Type

This is a circa World War I United States Marine Corps enlisted man collar disc for wear on the right collar. The disc shows an eagle, globe and anchor at its center and is in the rare longitude and latitude type.

Circa World War I.

Approximately 1" in diameter.

Brass.

Single screw post with disc backing and stabilizer teeth.

None.

This is from a United States Marine Corps insignia collection which we will be listing more of over the next few months. PAJJL12 LBGEX9/13 SBGEX1/14

7+ (Very Fine+): The disc shows some light wear and has an overall tarnish.

As with all my artifacts, this piece is guaranteed to be original, as described.