The Omega Seamaster Aqua Terra 150M Co-Axial Master Chronometer GMT Worldtimer 43mm (specifically the classic Deep Blue dial variant, Reference: 220.10.43.22.03.001) is one of Omega's most mechanically impressive and visually striking travel watches.
The Worldtimer Dial
  The centerpiece is a central 24-hour ring made of hesalite glass. It is split into two halves: light blue to indicate daytime and dark blue to indicate nighttime. Surrounding this is a ring of global destinations, color-coded by time zone conventions (London is highlighted in red to denote Greenwich Mean Time). The miniature map of Earth is crafted out of a Grade 5 titanium plate, where the continents and colors are achieved naturally through a high-precision laser-ablation process.
Open Sapphire Case Back 
  The clear exhibition back showcases the Omega Calibre 8938, decorated with luxury Geneva waves in arabesque. Certified by METAS, this movement is highly resistant to magnetic fields up to 15,000 gauss and features a free-sprung balance with a silicon balance spring. 
Configuration Options
  The watch is available with two primary attachment options:

• Stainless Steel Bracelet: A polished and brushed 3-link bracelet with a butterfly clasp.

• Integrated Rubber Strap: A structured blue rubber strap with a quilted texture and a solid fold-over clasp.

• Case Size: 43mm diameter, 14.12mm thickness, and 50.3mm lug-to-lug distance.

• Dial: Deep blue sun-brushed finish featuring a laser-ablated titanium vision of Earth viewed from above the North Pole.

• Movement: Omega Co-Axial Master Chronometer Calibre 8938, visible through the open sapphire case back.

• Water Resistance: 150 meters (500 feet), featuring a screw-down crown.

• Power Reserve: 60 hours from two barrels mounted in series.