If you recall, that's actually how TAG Heuer themselves got the anniversary date wrong for the Carrera.
When celebrating the 40th anniversary of the Carrera in 2004, they thought the original release date was 1964 because that's when it first appeared in a catalogue. However, by the time the 50th anniversary came around in 2013, they had learned that the Carrera was actually released in 1963, not 1964.
The catalogues are a great source of information, but not always exact when trying to date a watch's release or discontinuation.
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