Actually even more so Stingray. Stingray was, I believe, the first ever UK TV series filmed entirely in colour, at a time when there were virtually no colour TVs in the UK! But there were plenty in the US...
Gerry Anderson's shows, especially Thunderbirds, were made for the generation that played with Meccano and Lego, and built Airfix models (in the UK you didn't build Scale Models or model aircraft, you built AIRFIX models - even if the box said 'Monogram' - a bit like people nowadays who Hoover the carpet with a Dyson :-). Kids who knew perfectly well these were models, and understood how that connected them to the show. Nowadays, kids PLAY computer games, but they cannot connect to CGI in the same way, it doesn't physically exist.
Wulf