Blister scientific calculator M-240 430 since 1918 collection, navy blue

"M240 scientific calculator, 430 since 1918 collection. Navy blue colour, with hard-wearing translucid protective cover. With 2-line reading screen (10+2 digits). Simultaneous viewing of expression and result. 240 integrated functions, including 124 scientific functions. Trigonometric functions, parabolic and hyperbolic functions and calculation of up to 6 different types of regression; memory for the storage of averages. Automatic calculation of fractions, cursor keys for navigating through menus, bracket structure allowing up to 24 levels, memory for storing variables, computations using grads, degrees and radians, mutual transformation between rectangular and polar co-ordinates, mutual conversion between decimal and sexagesimal systems, random number generator, percentages, fractions, combinations, permutations, statistical calculations, large keys with structured arrangement, SCI/FIX/ENG notation functions, formation of sums. Power: 2 x AAA batteries (included). Dimensions: 16.7 x 8.4 x 1.9 cm. Includes instructions. 430 since 1918 Collection, inspired by the original colours and design of MILAN erasers, manufactured in Spain since 1918."