I have an old one left from a project and I have decided to fix it up.  Problem already is when I took some screws out they fell apart.  I have one I can use as a sample. The carrage does not advance, I think I have the wiring that is needed to make this happen.
So Slide Rules, including a class one I am showing my students. Calipers, a _good_ metal micrometer. I have used the drafting set already to measure the leather for the lens.

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