The original Bulova Accutron was advertised as the watch with "no balance wheel, no mainspring, no hairspring, no tick, no tock". The Accutron is an analog electronic watch but it's not a quartz watch. Instead it keeps time utilizing the vibrations of a tiny tuning fork. Another advertisement called it the watch that '"hums", and it really does...
This is a 1969 Accutron model 218. It was presented to my father by Union Carbide Corporation in 1970 for 25 years of service and is inscribed on the back. It has a 14kt gold filled case and still sports the original Speidel band. And it has the original box, case, tags and owners manual. There's also a congratulations paper in the box from Union Carbide with the name and address of the jeweler where it was purchased.