The narrow ring surrounding the dial is the most prominent feature of this sinn 456 series watch the ring is made of 18 karat gold and its colour contrasts beautifully the stainless steel elements of the timepiece this watch makes use of eta 2671 automatic movement which performs 28 800 vibrations per hour and has 25 bearing jewels additional features include appliqus attached by hand pressure resistance transparent case back and scratch resistant sapphire crystal glass with anti reflecti