I'm checking for a supporting add for this 1 if we even need it. it maybe the name is based on the name on the watch dial
ad Dated 1968 shows the 'AMBASSADOR' http://www.mybulova.com/sites/default/files/vintage_ads/1968BulovaAmbass... Just not in the exact configuration of the subject.
The 12 EBA (automatic), 12 EBAC (automatic, center Seconds) and the 12 EBACD (automatic, center Seconds, Date) Buren microrotor Movements are all a trait.
Good enough for Me.
Thanks Fifth...that's good enough for me too.