This is a model 4C common battery telephone manufactured by Hitachi, Ltd. This telephone is one of the "Model 4 Telephone" series, which laid the foundation for post-war Japanese telephone technology. It is a dial pulse telephone affectionately known as the "black telephone," and is characterized by its robust construction. From the label in the image, the serial number is 51035, and the manufacturing year can be read as around 1957 (Showa 32). Even now, it may be usable with dial-up lines and certain telephone services like "Hikari Denwa," but it may not be usable with push-button lines. - Type: Dial telephone - Color: Black - Serial Number: No. 96 - Cable Condition: Shows signs of use Thank you for viewing.