This vintage calculator set includes three classic models from Texas Instruments and Hewlett-Packard. Perfect for collectors or retro enthusiasts, these calculators feature unique designs and advanced functionality. Each calculator is in good working order and has been well-maintained over the years. The Texas Instruments models include the iconic TI-36 and the Hewlett-Packard models, the popular 12C and 10B. All three calculators were made in the United States and are sure to impress any vintage electronics fan.