The Time Tunnel, unlike Irwin Allen’s other TV series had no vehicle to exploit as a kit. The only regular piece of futuristic technology seen on screen was the Time Tunnel itself. Exciting dioramas from several American kit companies showing scenes from Lost in Space, Land of the Giants and Star Trek for example were produced but no Time Tunnel diorama.
However, a little known model kit was produced by Fugimi Mokei Co. in 1967, which would have been hard to get hold of at the time.
While it’s still pretty difficult to find, at least these days, there’s plenty of Irwin Allen web sites, which show the kit and give lots of information about it.
From what I can gather reading about the kit it was a bit of a disappointment, with very little in the way of diorama, and rather cheap.
The tunnel itself was just a just an elliptical tube with black paper decals to create the receding black and white strips seen in the show.
It was more or less a slide projector, with a film strip showing scenes fed into the back which is illuminated from behind.
Lunar Models did do a limited run of the kit using resin rather than plastic.The Lunar Models kit is sadly now no longer available