About Us

KIL Promotions made its debut in 2023 to bring a humanistic approach to specialized jewelry conventions.

KIL Promotions was created in January 2023 by CEO, Konstantinos I. Leoussis out of a lack of affordable and supportive jewelry trade shows in the NYC area. We launched our signature NYCJAOS show in November 2023 starting with 40 dealers and now we host over 150 dealers from around the world with a stunning array of antique and vintage jewelry., antique silver, Chinese and Japanese art, sunglasses, vintage designer handbags and more.

KIL Promotions has also expanded into the west coast launching the bi-yearly Hillsborough Show in San Mateo, CA (formerly Hillsborough Antique + Art + Design Show) with plans to expand abroad and to Los Angeles and Houston in 2026/2027. The Jeweled Collective also debuted in early 2025 as a smaller type of pop-up created for more intimate shopping experiences and also including a curated selection of vintage clothing.