Swank Art Deco Onyx & Silvertone Metal Lapel Pin

Solitary men's lapel pin, designed and sold by Swank. Onyx 3/4 oval, set in silver-toned metal engraved with a stylized fleur-de-lis and/or abstract scrolling. Vintage. Originally purchased by my grandfather in the 1950s or 60s. SWANK mark is present on back. Onyx and decorative setting are 3/8" x 2/8". Approximately 1/8" thick. In excellent condition, no visible damage or defects. The onyx setting loosened several years ago, but I had a professional jeweler repair it.