Is the ETA 251.252 a HAQ?

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I've seen some recent Longines chronographs with an ana-digi display, which I think are really cool. However, I can't seem to really find its accuracy specs. One listing stated it was the caliber L540.2, which is based on the ETA 251.252. Does anyone know if it was a HAQ, in addition to its full feature set?

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