It is totally unusual with its round oval cambered case, bezel and sapphire glass, AND its own movement, as the Cal 160 was only made for this watch. [nt]
For a bit more than 14 years, now... Another very special Ulysse Nardin, for sure, Aesthetically, with its original shaped case, and horologically, with its own in house movement, the Cal 160. Best, Nicolas ...