Hestermann & Sohn specialises in gloriously glam jewellery and watches with a contemporary spin. The Düsseldorf boutique features pendants, eternity bands and seriously dazzling cocktail rings that will inject elegance into any ensemble. The own-label styles are instantly wearable and have a dramatic simplicity that is hard to find elsewhere. Luxury brands stocked include Cartier, Niessing and Hermès. Limited-edition runs, such as Graham’s gutsy ‘Chronofighter’ watch, are worth a second look.