Omega Speedmaster series, Model: 321.90.44.52.01.001, automatic mechanical men's watch, Speedmaster series, HB-SIA Co-Axial GMT. The entire watch is made of titanium alloy, with a diameter of 44.25MM. It is equipped with the original Omega Cal.3603 automatic movement. The timekeeping is accurate and stable, and the luminous effect is sharp like a lamp. The carbon fiber dial is paired with an orange aircraft-shaped chronograph large seconds design. Engineers have used a custom carbon fiber honeycomb sandwich structure to create an ultra-light wing. It looks sporty and cool when worn, noble and luxurious, and is a single watch.