Hi Gang - Is there an email support list for mechanical calculators? I just picked up a MonroeMatic, looks like a model CSA-10, for a cheap price in un-molested condition. Tag shows an M.G. date of 982663. Just needs de-gunking cleaning and lube (hopefully). I can get it to do simple add / subtract but things like the 'set up' button aren't obvious. It's one of those jobs with the shifting accumulator along the top, multiplication and division ;) --Chuck