Swiss Made Accutron 214 Calibre Numbering System Change
At some point Bulova Accutron 214 movement got a Calibre Numbering System Change as follows Accutron 214 = 2140, Accutron 214H = 2141, Accutron 214HN = 2142 And a forth Calibre 2143 was added, Although I've never seen a 2140 movement because the Swiss never made a 214 without a hack spring...
Here is one of the Swiss made Accutron 2141 movements I just recently acquired, It's an N6...




