JTK Debut or sometimes called PoW which is short for purple on white. The first keyset produced by a company JTK. It is like GMK double shot abs. Comparing JTK with GMK, I would say GMK is more polished and the quality is more mature. Not too bad considering JTK is a new company. Not really sure if they created their own molds but if they did then they did a hell of a wonderful job.
I am not really too sure about the history of the molds all I know is that GMK bought the original tooling from Cherry and ever since then they have been producing cherry profile keycaps. In any case these JTK I would say is great if you want to try out doubleshot abs and want to know how it would feel like typing on a GMK.