Vintage cuff links and button links with original box

Vintage cuff links and button links with odd shaped original box. Box appears to be black leather but is in poor condition, crazed. Use to have name on the top but now too faded to see. Cuffs and buttons appear to be silver, a magnet will not pick them up. No markings, also they appear to be a dark shade of mother of pearl. I do not know jewelry but I do know they are old and very nice. Has both cuff links and three button links, nothing missing.