The working vintage 1987 Hewlett-Packard 10B Business Calculator is a classic handheld device perfect for business and financial calculations. Made by the reputable brand HP, this calculator features a regular-sized display, LCD display, and operates on battery power. The calculator is a basic, financial, and business tool, making it a versatile and reliable option for professionals. With its classic design and functionality, this calculator is a great addition to any collection or for everyday use in the office or business setting.