I think that's what started my fascination with tin robots. I had two - a talking one and one that showed a space scene in a television in its chest. Alan had a walking tin robot that would stop and fire guns! We used to have battles in our bedroom with them. Alan's lasted until we got back to England when he dismantled it and found that it was made from tin from old Coca-Cola cans and other re-used metal. They never wasted anything in Singapore! My robots lasted until the 1980s when, unfortunately, they were thrown away. They'd be worth hundreds of pounds nowadays and are very collectable. As I mentioned Marine Boy earlier, here's a clip from the show, I hope it brings back memories.
Gigantor was colorised and released on DVD, though I haven't seen any of the episodes. I wonder how many other people reading this remember the show?