I like everything about this but one thing. That particular pencil was not manufactured until 1978. No, not really, I have no idea about that, but could not resist. Try USM 35%, radius 60. The image lacks 'pop', so try the USM or up the contrast in curves a bit and see if that gives it more life.
I don't think that mechanical pencil is circa 1972. It also might have been nice to have soemthing on the graph paper, a bunch of calculations that would show the purpose of the slide-rule.