This vintage Sharp scientific pocket calculator, model EL-509A, is a must-have for any collector or enthusiast. With a sleek black case, this calculator is both stylish and functional. The LCD display and regular key size make it easy to use, while the power source of batteries ensures portability.

This Sharp calculator is ideal for business and industrial use, and is categorized under office equipment and calculators. Its features include LCD display, regular key size, scientific type, regular display size, and pocket size. Tested and fully functional, this calculator is a great addition to any collection.