Breguet

I was in touch with a dealer for the purchase of 3800st and his basis of sale was that his is TSwissT marked dial . What does this means ? Any views and comments ? Best,...  

So it is rare ?

Rare sure but not a huge premium over just "Swiss" dial which is whiter looking luminova. So yes nicer looking with tritium and a nice find.

not sure the tritium dial is key, on the contrary I tend to prefer the Luminova dial. I'll explain why as it might sound surprising for a vintage fan like me. A real vintage Type XX is definitely great, especially if military background and even better wi... 

... first gen had only Swiss on the dial. Until the late Nineties Tritium was used, followed by Super Luminova. The nice thing about Tritium: it changes it's appearance over the years, the watch gets a different face. In my view that adds character to the... 

Best,