2 Pair of Vintage 'Snap Back' Cuff Links

Wonderful pairs of snap toggle cuff links from the 1950's - 1970's. Mother of Pearl inlay with black ring (the top pair in the first photo) typically worn with tuxedo/formal attire; textured enamel and fabric-look blue and gold stripe inlay on the second pair. Both pairs have a .5 inch diameter on the face. I believe these cuff links were made by Swank. I don't have the original boxes.