Jewellery & Watch Retailers in Australia. DDS Diamond Design Studios have been making handmade engagement rings in Adelaide and individual jewellery pieces for two generations with all designs created in-house. We are an award winning family business, originating in Switzerland and have been established in Adelaide, Australia for over 50 years. Our parent company “Moser” was presented with the Australian Goldsmith Association 1st Prize for jewellery craftsmanship and design excellence in 1993.