Question: what is the difference between calibre 5 and 16?
Answer: TAG Heuer Caliber 16 is an automatic chronograph movement based on the valjoux 7750., is the one available on the carrera and the other chronos by tag. Caliber 6 is automatic with small second hand at 6 o'clock. Calibre 5 is an ETA 2824-2 automatic movement modified by tag.