What is this?

[Carlitosway2]

I found this piece recently, looks like some type of clip or pin. I am turning to the pros here to maybe help with the symbol meaning, date or any other info. Each side is about the size of a dime with no visable markings or wrighting other than the picture on front. Any help would be greatly appreciated.
[/ATTACH]

 

[Back-of-the-boat]

It looks like a G.I with a helmet other than that I have nothing.Was thinking a CRICKET.

 

[ScubaDetector]

Cuff link?

 

[nhbenz]

I think it's the god Mercury.