"Sherlock Holmes didn't have one specific Swiss Army Knife, but his iconic Victorian-era tool would be a multi-tool from a Sheffield cutler like Thornhill & Co. (makers of quality knives) featuring blades, a pen, screwdriver tip, and maybe scissors or a saw, predating the official Swiss Army Knife's corkscrew. Modern interpretations often suggest the Victorinox Outrider or Spartan, while some retailers sell a "Great Detective" version based on the classic Victorinox Classic SD with basic tools like a small blade, file, scissors, toothpick, and tweezers, reflecting his need for versatile, discreet tools. "