The IWC GST Perpetual Calendar combines the intricate mechanics of the caliber 79261 with the rugged and athletic design of the GST series. It came in titanium or stainless steel options, and the dial could be in German, English, Italian, or French. Keep in mind that the language on the dial may not match the pictures shown. The reference number IW3756-09 features a Stainless Steel case and a Pink dial.