oliverb
Posted November 30, 2012 - 8:34am
Bulova produced an almost unlimited number of variations of Accutrons, in terms of case design and dials. Some 218 date movements are marked 2181 while others, like yours are marked 218D. There are several 218 movements taht are followed by a letter to designate their sub caliber. Through the years, Bulova produced more variations (sub calibers) of the 218 than all their other 5 Accutron movements put together.