Rare Sinn 157 Titanium Chronograph, Cal. Lemania 5100 automatic, on original bracelet. This model was manufactured in the late 90's. It's a very wearable watch with the light titanium case which measures 38.5mm. Original tritium dial. Recently serviced, it needs nothing, timing is almost perfect, and the automatic Cal. 5100 sounds properly. The watch is in superb condition considering the age and case material. The case is in a fine bead-blasted finish. The case edges are still sharp and the bracelet doesn't have marks.