This vintage Sharp scientific calculator, model EL 510 S, is a great find for collectors and enthusiasts of vintage electronics. With its classic design and functionality, this calculator is sure to bring back memories of the golden age of electronics. The calculator comes with its original case and solar power source, making it a complete package. The brand of this calculator is Sharp, a renowned name in the world of electronics. The calculator is perfect for those who appreciate vintage electronics and want to add a piece of history to their collection. This calculator is categorized under consumer electronics, vintage electronics, and vintage calculators, making it a must-have for collectors of all categories.