The Executive Skeleton Tourbillon

From Ulysse Nardin -

Courtesy of Ulysse Nardin

Here are the pertinents -

Reference    1713-139 

Movement 

caliber UN-171 Manufacture
Skeleton, raised rectangular bridge
Escapement wheel and balance spring in silicium 23 jewels, 18’000 V/H 

Power-Reserve 

approx. 170 h

Winding 

manual winding

Functions 

Tourbillion, hours and minutes

Case 

titanium, ceramic bezel

Diameter 

45 mm

Water-resistance 

30 m

Skeleton dial 

oversized Roman numerals and index

Crystal 

antireflective sapphire crystal

Case-back 

sapphire crystal

Strap 

leather strap with carbon structure, with black ceramic buckle