NOVA
Posted June 6, 2012 - 10:58pm
The ad shows a slightly different watch. Look at where the lugs meet the case.
This watch actually matches the ad, in my view, so the difference is real, not just a matter of the artist's interpretation: http://www.watchophilia.com/photogallery/bulovas-1950-1959/a1953-ambassador/
I also have the same model as the subject watch and speculate that it is an Ambassador based only on crystal specs. I have not yet found a matching advert.