USMC medal ID age

[UShistorybuff00]

Hello everyone. I just picked this up and need some help on IDing the age. Please let me know what you guys come up with. I’ve seen Korean War and ww2. Internet research is taking me all over the place. Thanks. 

[daskrieg]

With the style brooch markings and lock, 60s thru the 80s

[Reforger]

I agree, approximately Vietnam War era.