Sterling Silver Vintage Cuff Links Beautiful Black Mid Century Movement Clasp

Beautiful Vintage set of sterling silver cufflinks with a black top. I am not sure if it’s a stone but
it does not scratch off so its definitely not painted on.

This item is from the estate of a retired WWII Coronel USAF Pilot who lived in Thailand and other Asian
countries from items and paperwork provided.
The back pictures show the hardware movement.
Weight of both cufflinks is 12grams.
Please look at the pictures and ask any questions you may have before purchase