Markings on outside of case: Bulova, L3, 1581319
Markings on inside of case: Bulova, 10K Rolled Gold Plate Bezel, Stainless Back, New York
Markings on Movement: Bulova Watch Co, U.S.A., 6BC, 21 Jewels, L2.
Markings on Band: 12 K.G.F., B/R Pat. 2433557
I can't find an ad match. Those lugs- almost like an elegant starcase which Miss America (or Miss Universe) would come walking down- except for the 21 jewels in subject vs 17 in ads. If it were a couple years earlier, a screen star could walk down those stairs to receive an award.
Gotta go unknown for now.
What a great looking watch - I love it! A very unique design and it looks brand new. Here's what I found:

Hello Betsy Ross
In reply to What a great looking watch - by Geoff Baker
Finding magnificent Geoff
Betsy Ross
Yeah bud, great ad find!
Betsy Ross, nice watch Bill.
Outstanding and a nice ad match Mr Baker!
Betsy Ross!! Good ad find, I sure didn't see it.
Boy, It's great to have a panel of experts ready to assist!
Thanks to all,
Bill