TNT Royal Retro by Pierre DeRoche Offers Sophistication

By Meor Amri Meor Ayob

Pierre DeRoche’s TNT Royal Retro model is unique as it has four (4) retrograde seconds’ hands function on four 10-second sectors. Coupled with two additional complications such as a power reserve and a date function, this particular piece is sophisticated. The skeleton case makes it a visual wonder.



Mechanical automatic, exclusive Dubois Dépraz calibre, 50 jewels, decorated and engraved oscillating weight, 12-pivot central bridge and 4 satin-finished seconds bridges, moving retrograde hand indicators, hand affixed by a transversal pin, 4 retrograde seconds hands on gears, strip-spring return.


Hours, minutes, seconds with retrograde function on four 10-second sectors, date and power reserve.


Black PVD-coated titanium middle, 47.5 mm Bezel, lugs, crown guard and crown in steel Anti-reflective sapphire crystal, front and back Water-resistant to 100 m (10 ATM/330 ft).


Alligator with steel safety folding clasp.


Honestly, I don’t get the need for the 4 retrograde second hands in 4 separate sectors of 10 seconds each. What about the final 20 seconds of the minute? Do we just assume it?

Engineering wise, it is an excellent piece of machinery.