SJ Presents: GR Omega Fifth Generation Constellation Series GR3 Men's Mechanical Watch, brand new original size 41mm watch! Newly imported automatic mechanical movement modification, customized 8900 movement with original special design. Five-in-one original imported mechanical movement, with a transparent case back for a perfect view. The case is made of 316L stainless steel, crafted using exclusive CNC technology, paired with a domed double-sided sapphire crystal, featuring a clear and even dial texture, with three levels of water resistance. The bracelet is made of 316 stainless steel, with an original folding clasp; please pay attention to the details. S1 exquisitely recommends this men's mechanical watch.