It has a date stamp of August 1940. Produced by Okidenki Corporation in 1940, this military communication artifact is a testament to its time. This vintage piece measures 270mm (W), 110mm (D), 170mm (H) and is encased in a reinforced wooden box with aluminium edges. It was equipped with a transmitter/receiver and a device for sending Morse code signals. Its compact design, consisting of a small crank handle for generating electricity and an auxiliary receiver, made it an essential part of the communication network on the frontline.
Please refer to the provided images for a detailed look at its condition.