DemcoQuartz is a family-run jewellery and watch business specialising in pre-owned luxury timepieces. Operating since 1990, the company serves customers in Brussels and Walloon Brabant, with a shop in Auderghem and offices in Waterloo. It buys, sells, exchanges and appraises luxury watches, offering a selection of more than 300 models from prestigious brands including Rolex, Omega, Breitling, Tudor and Cartier. The team purchases watches in a wide range of conditions, from unworn examples to damaged or non-working pieces, and offers free estimates.

DemcoQuartz also buys and sells gold jewellery, diamonds and precious stones, including old gold, coins, bullion and gold watches. Its services extend to watch and jewellery repair and maintenance through its workshop. Available watches are backed by warranties of six to 24 months, and deliveries are insured, with a stated average delivery time of 24 to 48 hours. Online purchases include a 14-day withdrawal period. Customers can arrange an appointment to view a watch or have an item assessed.