The Heuer Logo is there! But my Smartphone cam didn't chatch it on my UHD TV Screenshot . I guess Shelby made a hint that he pinched them from Ferrari...? Would have to watch that scene again. I assume, it might be these: https://forums.timezone.com/index.php?t=msg&th=1935168&rid=0
It is already known that TAG Heuer supplied the movie property master with vintage Heuer chrongraph watches for Shelby (Carrera) and Miles (Autavia). It is not hard to think that TH also supplied the stopwatches Great find on this one
And some more bits and pieces about these pocketwatches: http://www.onthedash.com/document/1963-rally-catalog/