Metal House was founded in 1943 under the name MARUMIYA. The company was the subcontractor of many famous tin robot brands like Yonezawa, Horikawa, Nomura, and many more. One of their ex-presidents was well-known in the tin toy industry for developing the Smoky Robot.
While virtually all of the well know Japanese robot and space toy sellers of the past no longer exist, Metal House still does. A family business which started before the war, Metal House still makes battery operated tin robots in limited quantities for collectors.
What's it worth? Take a look at this Metal House Robot price guide: sold listings for a value indication.