The 456 series consists of lady watches they are just as functional as other sinn timepieces but lack the massiveness in size this timepiece makes use of eta 2671 automatic calibre it performs 28 800 vibrations per hour and has 25 bearing jewels the blue dial is uv resistant additional features include a date window positioned at the 6 oclock mark appliqus attached by hand transparent case back pressure resistance and scratch resistant sapphire crystal glass with anti reflective coati