That's a bit of apples and oranges, Al. My initial comment related to movements made in the '60s. Furthermore, they were high-beat movements, which, at least in terms of potential accuracy, gave them an intrinsic advantage over many of their competitors. GP HF chronometers also performed exceptionally well in the Observatory trials.
So, while I appreciate that many movements have or had the potential to perform to chronometer standards, there was a meaningful distinction.
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