Steve, the Bub loco appears to be one of the combination clockworks they sold for both the European and American markets. A cowcatcher slid over the buffers on the front depending on where the set was sold.
The HWN set and boxtop. The log car on the box is actually inaccurate as you can see from the set. The flat car with the logs is covered when you add the passenger car shell, so the 3 in 1 set is single cars behind the tender depending on which option of the three you choose. The renderings of a 4-car set are totally inaccurate (unless you had a second set).
