Made in Bulgarian toy factory "Mladost". Nice quality late 1970s early 1980s Robots, RO1 1st version on left, last RO3 version on right. All three made entirely of hard plastic, battery powered (2x AA's) walking action with swinging arms and light up heads. 18 cms tall. Can be difficult to find complete, the battery compartment covers are often missing and foot stabilisers broken off. RO3 the last one made is particular hard to find as it was only made for a short time just before the factory closed, the most common being RO2 in the centre which had the longest production run. All three come in many different and varying colour combinations as can be seen from my three in photo. You can see two of my Bulgarian Robots in action by clicking the YouTube link at the top of website.