Ondrives Ltd. of Chesterfield, U.K., manufactured two gearboxes for a pharmaceutical company’s teaching purposes. According to the company’s press release, the client presented gearboxes to its current students to show how internal gearing works in both an epicyclical arrangement and spur reduction box. To show how these mechanisms work, gearboxes were made with a clear Perspex casing that allowed a good view of the meshing gear teeth. On the spur reduction box, a ratio of 500:1 was chosen so that a number of different gears would be moving at the same time, showing the possibilities of this type of box in a high ratio. Both gearboxes have been mounted on mahogany plinths so they can be preserved for posterity.