Back indicates this had a 10k rolled gold bezel, which appears to be missing. Uncertain of year of manufacture or model (maybe Concerto?)
You are correct with it being a 1966 Bulova Concerto.
I cannot tell if your watch is yellow or white gold case which will determine the variant as below.

Nice model ID and line book match. It looks white to me (will change if confirmed yellow).
1965 Bulova Concerto "NN" (updated to indicate correct date code M5)
Nice ad match, Stephen. Bulova Concerto
Variant to be determined by color verification. "Rolled gold bezel" refers to the metal body of the watch.
How did we date this one? I don't see a date code on either movement or case back. Date also pending verification from owner.
My guess would be white. The only other color is brown from a ton of dirt. Thanks much for all of the help. :)
In reply to My guess would be white. The… by urbanraven
Does the back of the case have a date code? Like M6 or M7?
In reply to Does the back of the case… by Kathy L.
It does have a marking "M5".
In reply to It does have a marking "M5". by urbanraven
Meant to include the following image:

In reply to Meant to include the… by urbanraven
The M5 indicates 1965, thank you for confirming. I have updated the date.
Concerto "NN"
Concerto for me until we can confirm date and color.