De Ville Tourbillon Chronometer Numbered Edition 43mm

From the retailer listing

Handcrafted by a select group of horologists at OMEGA’s Atelier Tourbillon in Switzerland, this extraordinary timepiece is OMEGA’s first-ever manual winding central tourbillon to be Master Chronometer certified. Cased in a blend of 18K Sedna™ gold and 18K Canopus™ gold, it features an 18K Sedna™ gold bezel and a sun-brushed dial in the same lustrous material treated with black PVD. Its indexes, polished minute and hour hands are in applied 18K Sedna™ gold. An 18K Sedna™ gold polished seconds hand is set in the tourbillon titanium bridge. The crown, also in polished 18K Sedna™ gold, features a Ω set in 18K Canopus™ gold. Presented on a black leather strap with polished 18K Sedna™ gold buckle, this exceptional example of the watchmaker's art looks sensational from all angles, as the sapphire crystal caseback allows a view of the 18K Sedna™ gold movement: OMEGA’s Master Co-Axial Chronometer