Mathbook 806L

This calculator , manufactured in 1975, is a hybrid device that functions both as a standard calculator and a converter for various mathematical units and formulas. The calculator boasts a sleek, compact design, with a black, glossy finish and a set of easy-to-read, white LED digits. The Mathbook 806L is an arithmetic calculator with algebraic logic. It has a VFD (vacuum fluorescent) display. The power source is 2xAA batteries. AKA: Auto Constant, AKA (Label): MATHBOOK # 806L , Product number...