William wrote:I deduced this, from how the light is reflected, by the teapot's surface, in the first and second picture. I may be wrong.
I can see what you are referring to but I'm not so sure this pot is underfired. Many Yixing pots are somewhat burnished giving a bit of shine to them. In fact, tingjunkie's pot is probably a very good candidate for developing a nice patina quickly. It looks like it will have high porosity but I don't think this means it is underfired. Many 80's pots look like this. I could be wrong, too.