Rebellion, model Twenty-One, reference number RB.21.GMT.ST.T03. The watch is housed in a striking cushion-shaped steel case. It is powered by an automatic movement and also features a GMT function. Additionally, the watch has a unique time display, with the hours shown on the disk in the center, the minutes according to the large red hand, and the seconds on the subdial at the 4 o'clock position. The GMT display is visible at the 8 o'clock position. The automatic movement is also beautifully visible at the back of the watch. Sapphire Glass. The watch is easy to read due to the contrast between the background and the contrasting hands. New and unworn! Movement : Automatic Case material: Steel. Glass: Sapphire. Dameter: approximately 46.95mm Plain: approximately 16.40 mm Length of strap: approximately 22 cm including watch.