Some plates illustrate movements by particular watchmakers, like the equation clock by Berthoud pictured in image 6. Some focus on horological tools, from those still familiar to a modern watchmaker (image 7) to those that may now appear less familiar (a machine for experiments on the friction of pivots in image 8). Other exploded schematics show link all the parts of a watch or clock (image 9) or specific features like a repeater (image 10).