: Sorry- should have clearer. I am wondering if these really were
: made by Heuer. Most of the well-known poor mans Heuer/ Zodiacs
: used Heuer cases, so we know that Heuer made them.

: This watch doesn't use a Heuer case, so does that mean it was made
: by someone else and we are mistaken to label this a poor-mans
: Heuer..I imagine Zodiac sourced watches from several suppliers.

here is the same case as used by Heuer is some of their 'economy' models (2 on the upper left), you can see the difference between those and the Carrera cases... and I think this Zodiac case is the same as those pictured in the catalog...
http://www.onthedash.com/Guide/_Catalogs/1970_Brochure/?show=02front.jpg