Lightness and functionality are the core tenets of the AUSN 0001. Ultra-fine design elements such as slimline lugs and the Swiss alloy construction - available plated in either 18K White Gold Rhodium. 18K Gold. 18K Rose Gold. or a combination of precious metals Rose Gold 18K + Rhodium 18K.�Retro sun lens colourways are muted and subtle as not to detract from the natural lustre of the precious metal plating.