The 27-line gold screw-post buttons used to secure the visor on the Marine Corps Dress Cap features the Eagle, Globe, and Anchor surrounded by thirteen stars along the edge of the button’s top hemisphere. It’s a design that traces its origins back to at least 1804 when it was used on the buttons of Marine Corps uniforms—but with six-pointed rather than five-pointed stars and no globe. (Six-pointed stars are still used in some USMC organizations such as the Marine Corps History Division.)
New recruits are issued a set of theses buttons along with a pair of black screw-post buttons, single combination cap frame, a white cap cover, and a green cap cover, allowing enlisted Marines to have a single cap effectively serving as two by switching out covers and buttons (the visors and chinstraps are the same on the enlisted Service and Dress caps). The same methodology can also be used by Officers, but they would also need to have a separate chinstrap for the Service and Dress cap.
More USMC Dress Cap Insignia/Accouterments
Enlisted Dress Cap Insignia
Officer Dress Cap Insignia
Enlisted Dress Cap Crown
Officer Dress Cap Crown
Enlisted Dress Cap Chin Strap
Officer Dress Cap Chin Strap