Antique Men's Cufflink Singles 5 pcs. 1920 - 1930 Abalone Gold Accessories

Lot of five mystery men's antique cufflinks from the 1920s and 30s all singles no matches to them but are unique and interesting in their own ways one looks like Abalone with brass or copper with mother of pearl one has a purplish Blackstone in it and is very nice with silver and intricate design the other is called staylock the round with the stripe design that on. Un hinges into two pieces says stay locked gold-filled on it the other one appears to be silver type of metal and the other one looks small with a latch pin looks like mother of pearl or Abalone I am not a jeweler or appraiser I'm just giving my best guess on what the stones and metals are sold as is very unique and collectible from the 20s or 30s ready to ship and I bundle thanks for shopping.