Ref. 3711 was introduced in 1993 and preceded the better known 3713. It was the first of IWC's pilot's watches to be fitted with the split-second chronograph function. The main difference with the 3713 is the glass, which is domed on the 3711. The 3711 was available in stainless steel, yellow gold and platinum.The full list of available references includes;IW 3711-01 Stainless steel, German day wheel, matte black alligator strap IW 3711-02 Stainless steel, Italian day wheel, matte black alligator strap IW 3711-03 Stainless steel, English day wheel, matte black alligator strap IW 3711-04 Stainless steel, French day wheel, matte black alligator strap IW 3711-05 Stainless steel, German day wheel, matte brown alligator strap IW 3711-06 Stainless steel, Italian day wheel, matte brown alligator strap IW 3711-07 Stainless steel, English day wheel, matte brown alligator strap IW 3711-08 Stainless steel, French day wheel, matte brown alligator strap IW 3711-09 Yellow gold, German day wheel, white dial, matte black alligator strapIW 3711-10 Yellow gold, Italian day wheel, white dial, matte black alligator strapIW 3711-11 Yellow gold, English day wheel, white dial, matte black alligator strapIW 3711-12 Yellow gold, French day wheel, white dial, matte black alligator strap IW 3711-13 Yellow gold, German day wheel, black dial, matte black alligator strapIW 3711-14 Yellow gold, Italian day wheel, black dial, matte black alligator strapIW 3711-15 Yellow gold, English day wheel, black dial, matte black alligator strapIW 3711-16 Yellow gold, French day wheel, black dial, matte black alligator strap IW 3711-17 Stainless steel, German day wheel, bracelet IW 3711-18 Stainless steel, Italian day wheel, bracelet IW 3711-19 Stainless steel, English day wheel, bracelet IW 3711-20 Stainless steel, French day wheel, bracelet IW 3711-21 Platinum, German day wheel, white dialIW 3711-22 Platinum, Italian day wheel, white dialIW 3711-23 Platinum, English day wheel, white dialIW 3711-24 Platinum, French day wheel, white dialIW 3711-25 Platinum, German day wheel, blue dialIW 3711-26 Platinum, Italian day wheel, blue dialIW 3711-27 Platinum, English day wheel, blue dialIW 3711-28 Platinum, French day wheel, blue dial