No, not TT scale, that's an older scale in between HO and N. It's been around a long time but never really caught on.
This is T scale. Named since it runs on 3 mm track. Amazingly it's about 1/2 the size of N scale (Wonder why they didn't call it HZ? That well worked for HO, which was named that since it's Half O scale.)
Quoting the website:
I recall hearing about it, but figured it was just a curiosity. It still is for the most part but they do appear to be getting more serious about it.
http://www.tgauge.com/
This is T scale. Named since it runs on 3 mm track. Amazingly it's about 1/2 the size of N scale (Wonder why they didn't call it HZ? That well worked for HO, which was named that since it's Half O scale.)
Quoting the website:
Having been launched in Japan in 2006 TGauge takes its name T from Three. Three relates to the 3mm track gauge.
The scale size of T is 1:450, which makes it around half the size of Z and one third the size of N. It’s not until you actually see these trains in real life that you believe how small they are!
Trains are powered by 4.5v micro motors which pick their power up from the rails. Traction and reliable connection is helped by the powered wheels being magnetic. In most cases, locomotives will also have directional lighting.
I recall hearing about it, but figured it was just a curiosity. It still is for the most part but they do appear to be getting more serious about it.
http://www.tgauge.com/