This vintage APF Mark 23 handheld slide rule calculator is a true gem for collectors of vintage electronics. Made in Japan, it boasts a unique design and unparalleled craftsmanship. Its model name speaks for itself, marking it as a true classic in the world of vintage calculators.

This device is being sold untested, adding to its mystery and allure. Its vintage status is evident in its aesthetic appeal, and its value as a collectible item cannot be understated. Whether you're a seasoned collector or just starting out, this APF Mark 23 calculator is a must-have addition to any vintage electronics collection.