Black Bay One 31 | 31mm, Steel, Diamond Blue Dial Calendar Since 1860

Since 1860

while the case back is stamped with the Constellation Observatory medallion

The Tank Américaine

With visual details and unique textures

Black Bay One 31 | 31mm, Steel, Diamond Blue Dial Calendar Since 1860The Black Bay One 31 36 39 41 models bring a unique aesthetic to the Black Bay One line. The curved cases feature a combination of finishes that elevates the watch in a contemporary fashion and offers a design language that slightly departs from the brandsiconic tool watch spirit to embrace a sophisticated, versatile, unisex chic look and feel. Fitted with Manufacture Calibers these models are at the cutting edge of technical watchmaking refinement.