(I've always found that a very silly-sounding tradition, but who am I to argue with Tradition?)

From the description here, I don't think the picture Nesh linked shows a Master's knot anywhere. The bottom row is for Crafters, but runs Apprentice - Journeyman - Craftmaster.

I'm having just as much trouble as Nesh figuring out what they look like, but I think I've got it figured out. So, with one loop under the arm (ie, around the joint), and one over with two small strings attached, I've sketched a representative sample of a Master Computerer:

Seen here explaining the problem with badly-constructed for and while loops to a wherhide-clad rider.

(I've gone with red as the craft colour - the first link above says both Smith and Starsmith use it, so it seems plausible. White would be an alternative. In the absence of a known colour for Landing, I've attached him to Southern Hold, who use green on green according to the same link.)

(If I were inventing colours for Landing, I'd go with blue and gold - the colours of the original Pernese flag. But I'm not even sure Landing would get colours; it's not really a Hold, right?)

hS