Hi Carpasio, welcome to mybulova. Neat watch, I haven't found an ad as of yet but think this might be a European produced model based on the interior case markings and apparent lack of a 3 letter import code on the movement.
At this point, I'm at
1973 Bulova Unknown, but still looking.
I've been back to this one at least five times, I can't find a thing,
1973 Bulova Unknown