@kyle I have that Monroe! Mine has only a small knob, not the crank, because it is intended to be run with an internal motor. I keep it in my office as a University instructor, and one of the kids pushed All The Buttons and it's jammed up right now, but before that unfortunate incident it was still working.
@elb You should take it apart and fix it! Or else give it to me since it doesn't work and all... ;)
@elb I took mine apart this weekend to fix a stuck key (see my timeline for a picture) and was able to unstick things with a small screwdriver, a cotton swab and some oil.
@kyle Whoops, solvENT
@kyle A little bit of solved fixes most ills with these old calculators, in my experience!