This post has been transfered from the thread "Matching pictures).
I believe I have shown this photo once before. I used it as a demonstration that possibly a more or less squarish model was a bit easier to cast, allowing for a seam of the vertical halves in the middle.
The models on top are square and show that seam. The models below have more round shapes, which took more die- elements to cast in my opinion. So possibly, if there was an opportunity to make a more square model, the casting would be easier - and cheaper no doubt. Just a theory ....