As the Carrera range expanded, there were several movements used, including the Calibre 360, the Calibre 17 and the Calibre 16.
The Calibre 16 is a Valjoux (remember them? They supplied the movement to the first Carrera back in 1963) 7750 and still used by TAG Heuer today, albeit in vastly reduced numbers.

“Nothing better reflects the changing importance of the Carrera than its position on the front cover of the 2005 TAG Heuer catalogue, rather than the third-last page back in 1997”