An interesting way in that the movement manufacturers operated was to offer the same movement in a variety of finishes. This meant that the watch companies had a choice of how much they wanted to pay versus how nice they wanted the movement to look. Occasionally this would extend to different components, or using gold- or rhodium-plating in place of nickel-plating, but often it was just down to how much attention was lavished on the visible components of the movement, adding perlage or Côtes de Genéves finishes to items like bridges and baseplates for example.

Some companies, like Rolex, did some (but not always all) of this finishing in house whereas others relied on the movement manufacturer for it. Heuer seems to fall into this camp, rarely buying the basic level of finish but equally rarely buying the most elaborate either. In some cases, it appears they used different levels of finish for the same movement in different models - for a watch intended for military use, I guess it makes sense that you pass on paying extra for additional decoration and elaboration of the movement.