Bulova 1965 Minute Man

I was unable to identify this one so hopefully someone here will have some information on it.  

Apologies, but the movement was stubborn and did not want to separate from the case back.  I do not work on these myself and did not want to use to much force trying to separate it as it is currently running quite well and keeping good time.  Yellow Rolled Gold Plate bezel that is more or less square in overall shape but has curved sides.  Case is small at about 28.3mm x 28.3mm without the lugs and crown.  Square crystal with a few light scratches but presents very well overall.  Dial is white in color with gold indices,  gold hands, and a sub-seconds dial.   I did not see this exact watch in current models listed, but may have just missed it.  The hour markers and dial looked a bit like the round Ensign models to me, but I didn't see any cases like this one. 

Thanks for looking and for any info!