3126.96.36.199.01.001 Omega This watch has 42.4 x 46.2 mm Stainless steel & 18K Sedna™ gold case. 18K Sedna™ gold bezel with tachymeter scale. Grey dial. Stainless steel & 18K Sedna™ gold bracelet. Automatic movement. Functions: chronograph, date, hours, minutes, seconds. Water resistance up to 100 m./330 ft. 3188.8.131.52.01.001 Omega Stainless Steel & 18K Sedna™ gold watch.