1954 Ambassador "B". Both back and movement are L4. RGP with stainless back. Another "sock drawer watch" in the original near mint condition display box. Watch has a couple light marks on crystal, otherwise near mint inside and out. Appears to me to be 100% original and based on where it came from I have no reason to dispute that.
Agree Ambassador "B"

Great looking watch Bob, excellent condition.
1954 Bulova Ambassador B
In reply to Great looking watch Bob, by Geoff Baker
Thanks Geoff, I love (as we all do) finding them in this state of preservation. Wish the hang tag was present, but hey, you can't have everything. Forgot to mention the band is a Foster 1/20 10KGFilled Top -marked "Pat. Pend."
Ditto Geoff
Very nice find. I agree with Geoff also.
Yup.... Ambassador B. Nice watch....