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The best way to get three stars is to also post an excerpt from the ad showing your watch. If they are a match--between the picture and any stated specs--the panel members will vote with three stars. If your watch does not match the ad exactly, a discussion will ensue, and panel members will vote according to their own judgment of the merits of the various arguments.
Now that I look at your watch next to the ad, I'm not sure that it is a Banker. The sides and steps look more rounded on yours. Here's a picture of another Banker in the database. It looks more squared off to me, but it could just be camera angle.
I took another look at the steps and they appear to be just a little rounded and not quite as sharply squared as the banker pic. Now the fun begins. Is it possible that the 15 jewels was a lower price option for the watch?
Hard to say what is possible, since we have no official records, other than the ads we've managed to collect thus far. We do occasionally conclude that a watch with a jewel count different from the one stated in the ad must, in fact, be that model, but it's not likely to get a three-star vote.
This case shape is tricky to pin down, because, in addition to the Banker, we have the Calhoun, Ben Hur, Ranger, and Chief, all within the same general time frame, and all with definite similarities.
And, of course, there could be others that we haven't seen at all yet.
Now I am having fun!! I am really excited and will try to dig for more information. I have a friend who's father was a master watch maker and a Bulova specialist who just passed away and my friend is going through all of the Bulova stuff to see what he may want to keep and I will acquire the rest including all of his ads and books. When this is done I may be armed with some new information to pas along to the group.