Inside the Bulova Accutron 218 movement Bulova made a major advancement in the 1960's by introducing the electronic Accutron timepiece. Its main components include the tunning fork and electromagnetic coils. The first one of its kind, the Accutron by Bulova was considered a breakthrough in the holological society. Almost 60 years old and still humming, on the bench in our Manhattan Time Service watchmaking workshop. https://www.watchrepairny.com/bulova-watch-repair | Manhattan Watch Service