Personally, I'm not really into recording of regos and the like, and even more so, I wouldn't have a clue as to the history of a certain aircraft if quoted a rego. I do remember specific aircraft by their callsigns, which generally are their registration (VH-NJM, TAO, PDW, IMX, KDK are profound ones I remember!).
However, in the course of my plane spotting and the like, I usually am able to photograph the aircraft and its registration, and thanks to the likes of digital technology, the time and date are stamped on it as well.
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