Interesting discussion. Took a closer look at my knives. There is indeed a difference between arcs and waves. I`m not sure if this happened really intentionally, or if they changes something in the production-process that made waves out of arcs. I added the new patterns to the compilation, and found a new one too.
The 84 mm one on karls picture on the bottom with the 3 lines of double-arcs is a new one to me. If you would like to sell or trade, just let me know.
I thought that they produced first the guilloche-scales to put them on the knife later. But the pins on the scales are also guilloched, that means that the design was put on the scales at the very end of the production. Seems difficult because of the different shapes of scales between 74mm, 75mm etc.