IWC's GST Perpetual Calendar combines the impressive caliber 79261 movement with the durable and athletic design of the GST collection. This watch comes in titanium or stainless steel, and the dial can be in German, English, Italian, or French. However, the language on the dial may not always match the pictures. The specific model IW3756-06 features a Stainless Steel case and a Grey (rhodium-plated) dial.