Vintage 1950 Art Deco MCM 10kt gold plated domed Mother of Pearl onyx cuff links

I cannot read the makers mark even with my loupe. It’s possibly “D & K” for Deakin & Francis, but I can’t definitively say it is. I know the cuff links are from the 1960s or before. Vintage-1954-1960s-Gold tone, oval shaped, almond Mother of Pearl bullet back cuff links with black onyx polka dots that comes with a complimentary gift box. I’m a Poshmark Ambassador II with over 2,400 items sold, have a 4.9 rating, am a top seller, and ship daily (except for Sunday’s). Please see my other listings. Bundle and save! gold, large, heavy, monogrammed, expensive, golden, pearl, ruby, sapphire, black, presidential, jeweled, shiny, silver, solid, studded, big, antique, functional, huge, initialed, fancy, massive, carnelian JM9079