Unknown National Semiconductor Calculator

From: GE
Email: gerard.evrard@free.fr


Hello all, I found a National Semiconductor Calculator of the full metallic front, slim line, fluorescent kind. It looks very much like the model 200 or the (I think) 24K. But it has all the usual (at the time) scientific functions : trigonometric & inverse, log/ln, exp, 1/x and square root. The single shift key is marked "F". It has a 9-place fuorescent display. Do you know what this is ? Any information (I already have the manual). TIA.