Vintage calculator that belonged to my late father. He was an engineer who worked at American Cyanamid beginning in the mid-1980's in Danbury. Has wear and tear to top metal bar case area mostly but generally clean and works well but is complicated and I did not find the manual. There were no batteries in it but I found 3 new pill batteries marked LR44 and put them in and it fired up right away. Nice calculator and working too. FAST AND FREE SHIPPING IN THE USA.
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