I have an old pipe here, my buddy gave it to me back in the 70's, not sure of the make. Smaller bowl, I like that size, great for quick smokes and I'm not a confirmed pipe smoker, sometimes only one bowl per month. Anyways, this little pipe has a "squashed" bowl, like you put the bowl in a vise and tightened it from both sides. The top opening is quite oval in shape, never seen one like it and not sure what the shape would be. Maybe a squashed billiard or something like that? Wish I could post a photo but I'm not at that level yet.