Produced by TT Factory, the three-in-one Longines Pioneer features a flyback chronograph watch. 1. It has a diameter of 42mm with a bi-directional rotating bezel that shines brightly and is equipped with strong luminescence. The Arabic numerals glow through small black apertures, in sync with the official website. 2. The dial comes in black and blue, with the chronograph sub-dial at the 3 o'clock position and the small second hand at the 9 o'clock position. The central large second hand serves as the chronograph's main second hand, and the flyback function is marked at the 6 o'clock position, making it a very convenient timing chronograph. 3. The sapphire crystal has a slightly domed shape and features anti-reflective coating on both the inside and outside. The bi-directional rotation is precise and smooth, and the watch is equipped with a screw-down crown that is easy to grip and adjust. The sealed case back is secured by six screws, providing excellent water resistance of up to 100 meters. 4. The stainless steel bracelet comes with a calfskin strap and a NATO blue fabric strap, offering different versions to suit various style preferences. The original folding clasp is designed to meet different wearing needs. 5. It is powered by the original L791.4 automatic winding movement, which can provide up to 68 hours of power reserve.