Tokyo Shibaura Electric Co., Ltd. This is a Mazda brand item from the current Toshiba. It was found in the attic of my family home, and although the details are unknown, it was left by a family member who used to work in the electrical field. It is probably from the Showa 30s to the early 40s (1955-1970), and I believe it has some historical value, but I don't know anything about it... Please consider it if you are interested.