This is a very rare "D"-shape Tuning Fork watch from 1971. An asymmetric watch is rare anyway! It is only produced in this year!!! Everything is original : The watch, the band and the inner-work. All and each part marked with the Accutron Tuning symbol. Numbered 3-310880 and with the year-number N1 Stainless steel: Watch and band Everything in completely working order. The watch is fully serviced by an expert last year and runs great! Also the band functions well. Dial with day/date function and hands white and grey with luminous inserts. Seconds hand is white. A very rare watch and so a rare opportunity to be the owner of one! Extra: Box of the same time period: Bulova Accutron