Runs beautifully on a gold Speidel Twist-O-Flex bracelet. Watch left to me in wife's Grandfather's estate Would love to know anything about it you can tell me
I'd guess I'd vote DD too. Just in that one ad above, we also see Banker "G" and a rectangular "AA", and there's sure a big difference between those three styles of Banker. I'd only go tentative, but it sure conveys more info if there's no conflict w/ other models/ads on site. We could say it looks very similar to the "big Banker at the top of the ad" but's it just as easy to say "the one with the DD variants in it's name". It may not be the DD, but it sure looks like it :)
Here is one I think we need to revisit as a Banker. According to the 1969 Linebook BAWD0172 this is a Sea King. This is more consistent with the Sea King styling and leads me to believe the Banker BB ad is probably an error since there is a different model listed as a Banker BB in the line book. That being said we do not have the 1968 line book but I am confident it is a Sea King.
1968 Bulova Sea King "DN" (based on this appearing to be gilt dial)