17 jewel self-winding caliber 8 BBA in a 10kt gold filled case. Marked L7
Reverend Robs' 1957 'AMBASSADOR' http://www.mybulova.com/watches/1957-ambassador-5967
* Note: Same Movement and Case design as the subject.
Unknown... we have no ad for this. Pretty rare movement though.
If Rev Rob's watch is an Ambassador I think we need to tag this as an Ambassador as well.
Obviously.

ad is 1957
'AMBASSADOR' "H"
The lugs on mine are different, from the back they can be clearly seen to be set inwards, without any smoothing with the case side, if that makes any sense. Also , the case looks different from the side, and my crystal appears a lot more curved. I'll try and get some additional pics up later today.
Updated.
I'v been gone for a month, but why isn't subject watch the "H" variant?
It is the "H" Variant. I think it's been I.D'd in another thread. I have two, one belonged to my Grandfather and the other was an online pickup (for parts). The self-winding mechanism gave out when I started wearing it as a daily driver. I won't do THAT again...