I used to collect a few and then decided to have a go at making them, done a few now, I'll dig some more pics out, mine are made from scratch, just cut from a piece of stainless and then shaped by grinder and file, I don't have the facilities to temper them, but they are made from pretty hard stainless so they hold an edge pretty well, bolsters are brass, and the handles are exotic hard woods, but unfortunately I lost the labels that I had it marked up with, an old friend gave me loads of assorted types.