|Base Caliber||ETA 2892-A2 or Sellita SW300-1|
|Jewels||21 or 25 depending on the base|
|Power Reserve||42 hours – up to 50 hrs depending on the model|
|Vibrations Per Hour||28,800 bph (4Hz)
|Features||Central hours; central minutes; central sweeping seconds; date at 3:00|
||Côtes de Genève on the rotor|
|Country of Manufacture||Switzerland|
|Known Models||(Add your watch in the comments below…)|
The TAG Heuer Calibre 7 is a Swiss made automatic movement based on the either the ETA caliber 2892-A2 or Sellita SW300-1 depending on the model and year of the watch. TAG also has a high grade version of the Calibre 7 which is COSC certified. Most, but not all of the Caliber 7 movements feature Côtes de Genève decorating on the rotor, which is also engraved with TAG Heuer / Calibre 7 / Swiss Made.
From Tag Heuer:
“All TAG Heuer automatic movements are made in Switzerland and must meet extremely strict criteria for precision before they make it onto your wrist. Their high frequency ensures excellent mechanical precision. A number of TAG Heuer automatic movements are awarded an Official Swiss Chronometer Control (C.O.S.C.) Certificate, the ultimate recognition of precision and reliability.”
When did TAG switch to Sellita for the Calibre 7?
When brands flip flop between base movements, they usually don’t make a public declaration about it. There is typically a transition period where the old movement will continue to be installed and on the market while the new ones are introduced. Also, the age of a watch is not always based on the manufacturing date, but rather the original date of sate. For this reason, it is not easy to track changes such as base movement transitions. If you know when your watch was originally sold by the AD and what movement is inside, please comment below. Such as with Rolex serial numbers, the community can work together to crowdsource this kind of information.