The Ref. 3711 came out in 1993, before the more popular 3713. It was the first of IWC's pilot's watches to have a split-second chronograph feature. The main difference from the 3713 is the curved glass. The 3711 came in stainless steel, yellow gold, and platinum. The options for the day wheel include German, Italian, English, and French. There are also options for the dial color and strap type. Platinum options have a white or blue dial, while the stainless steel options come with a bracelet. That's the gist of the different variations available for the Ref. 3711.