Vintage Electronic portable calculator TI-1031 1981 with box cover and manual #1

Great condition although ugh box is aged. Works please see all pictures please Four-key independent memory. Memory plus, memory minus, memory recall, and memory clear functions can be performed without affecting calculations in progress. • Easy-to-read liquid crystal display (LCD) shows 8 digits plus overflow, minus sign, battery condition and memory indication. • APD™ automatic power down prevents accidental battery drain by turning the calculator off after 5 - 9 minutes of non-use. • Percent key handles add-on and discount calculations automatically. • Automatic constant in addition, subtraction, multiplication and division. • Square root key.