Produced by SJ .Introducing the new CUBITUS 5821 watch from HBF Factory, part of the prestigious Patek Philippe Nautilus series.The Cubitus bracelet and dial strike a perfect balance between classic and modern, elegance and sophistication.Highlights: .1. Movement: Equipped with a customized 9015 modified Cal. 26, featuring a date window version and an automatic winding mechanism.2. 316L custom grade ergonomic strap with a new buckle design.3. Case: Measuring 45mm in size and only 8.25mm in thickness, the diagonal length from 10 to 4 o clock gives a visually refined appearance. Due to its near square shape, the width at the top and bottom is less than this measurement, resulting in a subtle visual impact. S1 highly recommends this exquisite men s mechanical watch.