Cheers, simpletreasures. My gut is that Bulova says Bulova and B = Benrus. I'm not completely convinced that "B" crowns are Bulova, myself, it's completely out of step with their corporate style.
UPDATE… the eBay seller has refunded my US$30 (hey, you can see why I'm asking, it's a lotta loot for a 2 buck crown…) and so it will go back into the swamp for another unsuspecting person to be and then write to this forum and ask the same question. He rarely shows the actual item, only the packaging and - as previous - would not answer my emails, which makes me think more and more that he thinks he's being clever with this. Most of his "genuine" Bulova crowns are unsigned (ie Bestfit substitutes) or "signed B." You are hereby warned - these are premium prices for generic or misdescribed goods. It's made more irritating for me, of course, because this has taken 3 tedious weeks to solve.
THANKS to all!