The original spirit of DERRICK TOURBILLON, redolent of the world of oil, remains intact. The watch's entire movement represents the drilling process. A drive shaft sits on the right of the dial, between 2 and 4 o'clock. This powers a long articulated arm, known as the walking beam, between 10 and 2 o'clock. At its left-hand end is the oblong-shaped 'head', the most striking visual characteristic of a derrick.