Bulova is in fact a Swiss watchmaker. They invented the Accutron system in the 30's but it was impossible up to the late 60's to miniaturize it enough to make a usual size watch out of it.
Accutron watches are truly fascinating pieces of technology, because they use a variable magnetic field to keep a diapason vibrating at 60hz (120hz in later models). They have a transistor, a capacitor and other electronic components in, and they were built in the 60's! The vibration of the diapason is enough to have a small stepper moving, and this makes a wheel turn, and so you have a working watch.
Accutron watches were the most accurate watches that you could have in the 60's, so were used on aircrafts and even by astronauts. They also built a beautiful Accutron Spacewiev model, all made from glass so that you could see the insides. And this was 25 years before Swatch came about with the same idea!
Yes, I do own a Spacewiev, did you notice it?