Heuer appear to have made so-called "poor man's" watches for both Clebar and Zodiac.

I think the bridge shape just means it's a later V72, the classic yoke-shaped bridge tends to be found on the earlier 72 movements. I'm not sure whether the inscription of the watch marque was done by Valjoux or the marque itself, but I reckon they just manufactured bridge blanks and that was the shape you got, whether you were Heuer, Rolex. Or Clebar. :)

Makes sense that a Clebar movement would be used as a donor for a Heuer though.