1968 Accutron Astronaut

I just added my 1968 Astronaut to mywatches.  It's the one shown as 1968-Accutron Astronaut under new watches.  Most of the pictures I find on the Internet are watches with the stainless steel bezel.  Where mine has a black dial and black bezel.  Was that just not a popular option back then or is that a special model?