From a 1970s set 9 manual, model 9.2. It presented very few problems in construction. One point of criticism is the level of play in the platter. A 57-tooth Gear would work better than the 19-tooth Pinion used. Also there are more pinions used than there are in the set.
There is a descriptive video of this model on YouTube, time index 2:00.
There is also a video of this model drawing on YouTube.