I use to sell these beauties in my previous life as an IBMer.
It was always exciting to get your new ThinkPad, loaded with IBM specific SW and re-boxed. Ones that stand out in my memory, but I forget the numbers, are
1. The small "Butterfly" Model. When you opened the lid the keyboard gyrated and ended up being bigger than the base.
2. The "Tablet". It had a keyboard but in this model the lid would swivel around 180 degrees and you folded it back on top of the key board and prodded it with stylus. Great to demonstrate but I always used the standard keyboard in the privacy of my own home or office.
3. The "Overhead Projector Model" This time you could remove the back of the lid, open flat and place screen, less it's metal lid on OHP and show your "Storyboard" slides. In a perfectly dark room the audience could even see them.
However my favourite story was about the salesman who returned his ThinkPad as faulty. He had a puncture and being on soft ground (not sure what he was doing?) the car jack kept sinking so he placed his ThinkPad under the jack to spread the load!