Seamaster Aqua Terra GMT is a new member of Omega’s exclusive family of proprietary Co-Axial movements. The Co-Axial caliber 8605/8615 is the first equipped with a GMT complication, meaning that along with the central hour, minute and seconds hands, there’s a GMT hand, which completes one rotation every 24 hours. That makes it possible to track time in two time zones. Seamaster Aqua Terra GMT, with the Co-Axial calibre 8605/8615, is the first of Omega’s proprietary movements to be equipped with a GMT complication. Along with the central hour, minute and seconds hands, there is a GMT hand, tipped with a red arrow, on a 24-hour index. The Co-Axial escapement in the Omega calibres is used in conjunction with a free-sprung balance, which can be adjusted to vary the rate by means of gold regulating screws.
The Co-Axial escapement ensures the stability of the rate, resulting in reduced friction and less need for lubrication. This model is also equipped with a silicon balance spring. The pattern of vertical lines on the dial recalls the wooden decks on luxury boats. Case options include 18k red gold, stainless steel or two-tone, in steel and red gold, with a bracelet or leather strap in black, brown or blue. Hands and indices are covered in Superluminova. The GMT hand can also be used as a compass. When the watch is held with its hour hand pointed in the direction of the sun and adjusted to the same time on the 24-hour display, it will indicate north in the northern hemisphere.
First Published in Men's Passion Issue #40 May 2012