"Gamma" is the "Bulangshanyun", which by coincidence or design is the same name as the dreadful "Bulangshanyun" from Puerh Shop that I lamented a few days ago. Yunnan Sourcing notes that this cake was made from 2006 maocha from Mannonzhai [winding-lane village], near Hekai, some 20km north of Banzhang.
Everyone I've seen so far has putting "gamma" at the end of the list (alpha, beta, delta, epsilon, gamma), but as it is the third letter in the Greek alphabet, I am going to insist upon correctness! Don't say you never learn anything from the Half-Dipper.
The leaves look a little older than the other cakes, which were super-fresh 2009 leaves. These Bulang leaves are quiet, a touch mellowed. As shown below, the soup is already orange - certainly more orange than aging for three years should provide, and so we suspect some pre-oxidation, wulong-style. The aroma is largely invisible - there is some tangible compound being emitted, but it has no detectable scent.
It is a simple tea, but smooth enough for me on a busy morning. I find that it has a creamy ending in the throat, emphasised by the somewhat creamy water that our tetsubin delivers, and this reminds me of the little 2008 Douji "Dadou" and "Shangdou" bricks, which are almost milky.
This tea is the second-cheapest in the range of five cakes, at $25. I enjoyed it, but be aware that you're not buying fresh, green shengpu - rather it has been aged in a sub-optimal environment, and possibly processed in an imperfect manner. A simple tea, and while I enjoyed it well enough, I would not count it as one of my favourites among the five in the tasting event. Its processing and aging would prevent me from buying it for storage.