A masterpiece of perfect symmetry, the Instrument DBG Equation GMT features two separate time displays, each driven by its own barrel and gear train with its own escapement and balance. This highly unusual technical specification permits the two displays to be set independently of each other. Although it is a standard feature of watches displaying two or more time zones for the hour hands to be set to different times, being able to set the minute hand as well opens up other possibilities. It means, for instance, that the display can be set to show the precise time in zones that differ from Greenwich Mean Time by a fraction of an hour, such as a quarter or a half. In addition, a subdial at 12 o'clock shows the equation of the two time zones on a 24-hour basis. This enables the wearer to see the time difference between the two zones and also to ascertain whether it is day or night in the second zone. Both time zones share a common permanent seconds in the shape of the long slender hand emanating from the centre of the dial, which is a hallmark feature of the new Arnold & Son's Instrument collection.
Functions Local hours, minutes and seconds, GMT hours and minutes, local time 24 h indicator, GMT 24 h indicator
Caliber A&S1209 Exclusive Arnold & Son mechanical movement, hand-wound, 42 jewels, diameter 35 mm, thickness 3.9 mm, power reserve 40 h, 21'600 vibrations /h. Movement decoration: Nickel-silver movement, rhodium treated with Haute Horlogerie finishing: manually chamfered bridges and polished edges, fine circular graining and 'Côtes de Genève', blued screws.
Stainless Steel, diameter 44mm, cambered sapphire with anti-reflective coating on both sides, case back see-through sapphire