I saw the pot a while back and am somewhat skeptical about this particular claim.
I have corresponded some with the owner of the shop. While some of the tea, and some of the pots, are good, I think some of the age claims, as well as some of the claims about the material, are a little unlikely -- I'm not sure if he is intentionally misleading people, or just misinformed about certain items. The prices range from "in the right ballpark" to "kind of high".
Have you tried any Dayi from them? I am asking because I wanted to buy some whole pieces from them. After trying their samples of course. The problem is that I've never tried some of the teas I want to sample so I can´t tell if they are the real thing. Maybe I will buy something I own first. Just to make sure...