Is this a WWII era Marine Corps pin?

[Collector5516]

HI All - I recently found the two pins shown below at an estate sale. The gentleman who lived in the house served in the army during WWII. I know the one pin represents the 7th Army (I assume it is an occupation made pieces?) but don't know about the USMC pin. Is this WWII era? Could it be earlier? Any information is appreciated. Thank you!

 

 

 

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[Brig]

likely WWI-WWII...a widely used pattern with sweetheart jewelry

[teufelhunde.ret]

I date this EGA sweetheart pin to the ww1 era.