The Jock Olsen was tied by contributing fly tyer, Scott Howell. You can see more of Scott Howell's flies at The Flies of Scott Howell.See his notes below about this fly
Scotty's Notes: This Jock Scott-inspired fly was designed by renowned angler/author Erling Olsen of Frogner Norway and has proven itself to be one of the most effective flies ever fashioned for Salmon and Sea Trout. The "semi-toned colors" and "transparent image" of the Jock Olsen will suit just about any stream color or condition and is ideal for big Salmon - especially when fished in deep pools. While it was conceived for Scandinavian waters, it's a marvelous addition to your fly box for Pacific Northwest rivers as well.