Yes, there is a B pillar inside
It has over the photo etched windows. I'm not a big knowing of each Imperials versions, so I only wrote the same you can read on the base. For sure, Kess did a mistake on it as GLM named their 1956 Limo as LeBaron when in fact it was a Crown Imperial. I think the only mistake you can see in this model is the front bumper a little down and the grille a bit bigger, but, in my personal case, I like the model and I can live with it. Maybe there are artesanal manufacturers which make better and accurate models, but for today, those are very far from my wallet and possibilities. I liked to add more Imperials to my collection, and this is one of my few choices...