These are two pairs of cufflinks. The gold tone cufflinks are not marked. They have red and blue enameling on the moveable heads. The tops measure 1/2 of an inch. The silver tone pair has an S mark I believe stands for SWANK. This pair has black onyx stones in the center. The tops measure 3/4 of an inch square. Both pairs of cufflinks are in very good condition with no problems that I could find. They may need cleaning or polishing. Please let me know if you have any questions. Thanks for stopping by.