This vintage Texas Instruments TI RK-1 Rechargeable Kit Plug Calculator is a rare find for collectors of vintage electronics, particularly vintage calculators. The calculator features regular sized keys, a basic type, and a handheld size. It also comes with the original rechargeable kit plug.

This vintage calculator is a great addition to any collection and is sure to be a conversation starter. It is a must-have for vintage electronics enthusiasts and collectors of vintage calculators.