By "the boutique edition", are you referring to the other two Calibre 17 models, the
CV5111.FC6335 and the
CV5110.FC6310? I don't see any indication of COSC certification, either on the dial or on the Tag Heuer catalog webpages (under "MOVEMENT" of each watch).
On the other hand, the
Carrera Calibre 8 GMT has COSC certification, clearly. The dial says "Officially Certified", and the webpage says "C.O.S.C. certified automatic watch".
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