Cufflink? & from what era?

[terryin pa]

Curious about a small find I made. Is this a cufflink and from what era?

 

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[deepsecrets]

US Army Collar device - 20th C - maybe WWII era - Korea?

 

[Patriots]

Not a cuff link....Collar device from a service members uniform.

 

[ARC]

issued during WWII...
Did away with this design due to the "twisting" and lack of "staying in position". IMO

And adopted the "two pin" design.