The collaboration began
link several years ago, out of a desire on Tudor's part to create a modern, robust, and reliable chronograph caliber that
link it could offer to its consumers at a very approachable price. Modifications to the B01 include a Tudor oscillating weight and Tudor's own finishes, as well as regulating organs made by Tudor – this includes a silicon balance spring. As well, the layout in Tudor's Black Bay Chronograph is
link two-register, with Tudor's historically-significant 45-minute counter.