Lol, funny you should ask.
I just received an ASSA Twin from AnyLock and was looking for more info on it.
here's an interesting article written by Han Fey about the ASSA Twin system.
Unfortunately it didn't help me in recognising which Twin cylinder I have (it says Twin_Combi on the key), but it did give me a better understanding of the inner workings (especially the 2nd row of pins).
I came close to picking it but haven't succeeded yet, but I will some day

Mark