Have been doing some research on a Western Fillet knife; but I’m not finding any answers. Time to ask the pros. The subject knife is a Western (duh) fillet knife, with a 6” blade, and 11” overall. It is stamped W766, with an “F” code. What I’ve learned, or think I’ve learned is that it’s a Model W766, that was made in 1982. But what I also encounter is that by far, most of these model 766 fillet knives are marked S-W 766. Does anyone here know what, or why the difference with a knife…