Here is a video on the operation of the sort of machine these type sets were intended for. https://www.youtube.com/watch?v=7am-ysvGD3s https://www.youtube.com/

Here is a video on the operation of the sort of machine these type sets were intended for. https://www.youtube.com/watch?v=7am-ysvGD3s https://www.youtube.com/watch?v=7am-ysvGD3s (Inheritance Machining)