http://www.accutron214.com/accutronq&a.htm
My 1967 Bulova Accutron 214 stopped working over a year ago so I had a local watch repair shop clean and refurb it. It would hum but the hands had stopped. I got it back after a week, and it is running beautifully, though it is gaining a couple of seconds in 24 hours, [according to the world clock on my ipad] but I'm OK with that. My quartz watches are more accurate, but I've always been fascinated with the unique battery powered tuning fork movement and the sweep second hand, {it doesn't tick per se} especially considering the Accutron debuted in 1960. All the NASA moon missions had a Bulova Accutron clock mounted in the space capsules instrument panels and Bulova gave each astronaut a new Accutron astronaut model watch as a gift. Mine is the no frills base model, but I do have the original box, battery hatch tool and period Kreisler band. The link provides a lot of interesting history.