from Littleton, CO United States
ITC carries 3 versions of Yunnan black tea: Select, Superior, & Royal Gold. They all have some gold leaves, with Select having the fewest, Superior the next, & Royal Gold the most. If it's a great year, Roy will designate the best version as Imperial Gold, which will be almost all gold leaves. This is the version described in his book.
It's a terrific black tea - I guess my favorite, although the Superior grade is nearly as good: sometimes a bit more flavorful, but not quite as smooth or elegant. If it were cheaper, I'd probably drink it most days.
I like it with 2 tsp. per 5 oz. at 193 F for 3 minutes. I brew a total of 3 infusions, although the 3rd one is pretty mild.