This one appears unique to any I have encountered. I purchased it convinced it was a Director with a refinished or swapped dial. However, once I had it in my hand, I think it's original and seems to be a undocumented Navigator. I find no reference to a black face Director, they all seem to be 2-tone copper when cased in rose gold.
Case is Rose gold, as is the Band. The face is a reverse of any Rose Gold watch I have ever seen. Face is black with copper hue rose gold numbers and seconds tracks, which are an exact color match to the case. It also has a slight curve that matches the case. Face condition suggests it isn't a redial. It is age spotted with some light scratches that appear old.
I find two ads in the short ad section (currently on top of Pg.5) that seem to substantiate my thoughts. Both of these ads show a Navigator with no case engraving. One lists as Rose (Pink ) gold, but shows a light face. The other lists no color but depicts a black face. I'm wondering if there were a few variants, being yellow with engraving that is normally seen and perhaps two variants without engraving in rose gold?
Hands are yellow gold, which may be replacements. But did Bulova even produce or use Rose Gold Hands? I would say not, as normally the face would be copper and sport black hands, while a standard black dial normally had white gold (or yellow) hands to match the case.
Currently keeping perfect time.