A6) Casio Scientific Calculator Electronic Scale fx-190 1983 Showa Retro This is a scientific calculator integrated with a ruler. On January 1st of this year, I replaced the batteries with new ones and confirmed its operation. It comes with a case, which serves as protection. The surface of the case has black scuffs and other marks. Calculation results can be displayed on the LCD screen located below the ruler. Ideal for: - Maps - Drafting - Statistical work It has 42 built-in functions and includes Heron's formula, which calculates the area of a triangle from the lengths of its three sides. It also features a 52-step programming function and statistical calculation functions for finding standard deviation, among other diverse capabilities. - Brand: CASIO - Model: FX-702 - Accessories: Includes case - Function: Multifunction calculator - Display method: Digital Thank you for looking. -- Price is firm as this is a rare item --