TUDOR Black Bay One 39 S&G Screw Down Crown Tested and approved at the

Tested and approved at the industry’s highest level

Seiko's innovative technology has changed global standards

Crafted in 18K Sedna™ gold

the GMT hand has a generous layer of Lumibrite to ensure legibility in low-light conditions

The COSC is an independent Swiss organisation that only issues its chronometer certificates to these pieces after the watches have undergone numerous tests over several days

TUDOR Black Bay One 39 S&G Screw Down Crown Tested and approved at theThe Black Bay 31, 36, 39 and 41 bring a more formal feel to the Black Bay models. Like other models in the Black Bay line, they feature a dial inspired by the TUDOR divers watches produced during the 1950s. These contemporary models boast characteristics of the first generation of TUDOR divers watches. 39mm steel case, Steel and yellow gold bracelet