A pun?

Son globe anchor?

 

What is it? A yoyo?

 

looks like a button...

 

LOL size is everything I guess. So kind of like the Marine Corp only with a sun instead of an eagle?

 

It's a screwback pin. The disc is celluloid. The disc is about 3/4".

 

I think the key is figuring out what landmass (island?) is depicted on the globe. I thought it might be Antarctica, but it's not. One of the Pacific islands where there was major action during WWII?

 

ROCMC

Device worn with ROC sun-like symbol at top, then the island depicted (Taiwan aka ROC) is correctly oriented for N/S

 

Spring to the rescue!

 

Could it be pre WWII and still mainland China?

It looks more 1930s.

 

Doubt it but it isn't shown in this particular collection.

http://marinebadges.com/collection/taiwan/badges

Gotta go and watch one of the few sci-fi films I haven't seen, on a TV movie channel. "Phase IV" 1974, Brit.

A strange cosmic event creates rapidly evolved ants in an Arizona desert that threaten humanity's domination of the planet.
FEATURING: Michael Murphy, Nigel Davenport, Lynne Frederick

 

The sequel has uncles so don't bother looking for it.