Although the exact age and materials are unknown, these are Art Deco vintage cufflinks from around the 1920s-30s, featuring a hexagonal black stone design. A wonderful design not found in current products! Besides stabilizing the shape of the cuff, they also serve to prevent soiling and add decoration. A stylish accent! Also great as a gift! Markings: None Please refer to the ruler in the photos for the size. I'm only wiping them dry for sale, as improper cleaning could cause uneven coloring. Enjoy the unique texture of these antiques. They are approximately 100 years old. There are minor scratches and signs of aging. Please refer to the photos for the condition, as there is evidence of use. The last photo is a reference image from a contemporary advertisement. If there are no issues with the product, you can purchase it immediately without asking questions. It's a first-come, first-served bidding system. I generally do not negotiate prices. I will decide when to lower the price. Please conduct transactions with common sense, following Mercari's rules. Please also read my profile. ★ Please bid only if you can start the transaction within 24 hours of winning the bid and make the payment within the deadline. ★ To save on costs, items with shipping included will be sent via the lowest-cost shipping method. If you have urgent requests or specific date/time requirements, please consult with me before bidding. The price may increase depending on the request. ★ I am an amateur, so I may overlook the loss or damage of small parts. Measurements may also have slight variations. ★ Please note that the color and texture may differ slightly from the images due to the shooting conditions. ◎ Feel free to ask questions about the size or other details! I will answer to the best of my ability. Search Keywords: Title product name, borrowing words Formal, weddings and funerals, parties, weddings, presents, Christmas, gifts, antique, Showa retro, pins, tie clips, tie pins, tie bars, tie tacks, rockabilly, 30s, 40s, 50s, 60s, swing, gold, silver, brass, menswear, suits, shirts, made in America, accessories, jewelry, dress shirts, suits, men's