In the mid seventies, UK Toy Maker (and the inventor of Spiro Graph) Denys Fisher took a Japanese Toy called Henshin Cyborg which was an off shoot of Captain Action (and the father of the Micronauts) and made it a 9" series of figures.
The back story was told in a series of beautifully illustrated comics on the back of the box, It's the 23rd century and mankind has faced doomsday at the hands of the alien warlord muton, the last survivors form together to build Cyborg a powerful being with a skin made of diamonds. Minutes after his birth, Cyborg swings into action against Muton.
Many thanks to Bill Frost and Andrew for this gallery
Click on the images below to see larger pages with descriptions: