Was looking at Ebay today and noticed something I found interesting and thought I would post it here to see if anyone could add anything to it. It concerns the Yello Bole Imperial line. On Ebay I saw a 9.75 inch long churchwarden bearing the Imperial name. I have a small Dublin marked Imperial. After doing some more looking on Ebay and a few other sites I found four more shapes marked Imperial. They were Canadian, Bulldog, Bent Rhodesian, and a Square Billiard. Also found a full sized Dublin with the mark. I also found four different logos for the Imperial line. The standard yellow circle, standard black circle, an "I" in a circle, and Imperial with a crown above it. The pipes seemed to span a good part of the Yello Bole time line. They went from the 1930s numbered shanks through 1955 when the KBB was taken off the shank. Also found them with both Vulcanite stems and the yellow stem (can't remember what they called that at the moment).
Anyone know of any other shapes or logos? How they decided what made something an Imperial?