Constellation 28 mm, steel Sedna™ gold on steel Sedna™ gold 131.20.28.60.55.001 VERTIME BV SM927 and secondsCollection: M SeriesHour Markers: [Standard and secondsCollection: M SeriesHour Markers: [Standard applied markers]Hands: [Standard styled hands]Case Shape: Square cushionMaterial: Polished stainless steel with dark blue PVD animation ringGlass: Hardened K1 mineral glass with anti reflective coatingCase Back: Polished stainless steelDimension: 47 this bag showcases the natural quill pattern that makes every piece unique while adding texture and sophistication to the design while the caseback is stamped with the Constellation Observatory medallion This 28 mm 18K Sedna™ gold and stainless steel model features a bezel engraved with Roman numerals