wow these look great! The Mao pictures (thats what is there, right?) really have a historic touch - very vintage
there were seven pieces imported in the 80s here, but couldnt sell during that period of time because no one drank such teas, and the quality of the tea is terribly coarse with very rough processing, so much so that many tea snobs wouldnt even touch it with a ten foot pole!
but now with enough age, the rough is smoothening.. and that is why those whom had drank it, considered it a beggar turning into a king (乞丐变皇帝)
a local tea master had experimented with the brewing for two days, and came up with one that worked really well. now desired by many, but just not enough bricks to go around. i'll leave mine stored for another couple of decades to see what it will turn into.