Calibre 7 Twin-Time

TAG Heuer Calibre 7 is a self-winding movement displaying hours, minutes, seconds, an additional 24-hour hand (adjustable) and date. It is based on either the ETA 2893-2 or the Sellita SW300. The ETA version uses 21 jewels and has a power reserve of about 46 hours. The Sellita version uses 25 jewels and has a power reserve of about 42 hours.