From the heart of the Swiss watchmaking industry in Vallée de Joux, Pierre DeRoche presents a new version of the TNT Royal Retro with a GMT display adjustable to the nearest half hour. It’s achieved not via a corrector, but, unusually, by use of the crown.
To avoid any loss of precision during adjustments, the GMT hours and minutes hands advance in 30-minute increments to guarantee exact half hours, without the movement stopping. A third indicator appears on the white part of the sub-dial if it is daytime in the zone of the second time zone; or in the black section if it is night-time, all this while the TNT Royal Retro signature retrograde seconds hands pursue their fascinating path. Two of the six original hands vanish in the lower section of the dial to provide space for the GMT indicator. The watch is limited to 201 pieces.
MOVEMENT: Mechanical automatic, exclusive Dubois Dépraz calibre, 48 jewels, decorated and engraved oscillating weight, central bridge, 4 chamfered and satin-finished seconds bridges, minute wheel with Pierre DeRoche logo, hands affixed by a transversal pin, 4 gear-driven retrograde seconds hands with strip-spring return.
FUNCTIONS: Hours, minutes, retrograde seconds in 4 ten-second sections, moving retrograde hand indicator, date and second time zone adjustable in half-hour increments.
CASE: Black PVD-coated titanium middle. Bezel, lugs, crown-guard and screw-lock crown in steel, 47.5 mm diameter. Sapphire crystal with anti-reflective coating on both sides. Sapphire back. Water-resistant to 100 metres.
STRAP: Alligator with safety folding clasp.
LIMITED EDITION: 201 pieces.