I will orgazine this response into a more permanent "Comparison" page, but you are correct

• The Heuer Carrera 12 Datos, and the more common Zodiac and Clebar Poor Man's versions, have relatively small, simple lugs. (as shown on the top two images).

• I have seen at least two of the Clebar 12 Datos that seem almost identical, except that they have fat, more complex lugs, that actually extend all the way to the pushers (as shown on the bottom photo).

• Until your very interesting message, I hade never seen a Heuer with these "fat" lugs.