This 1916 catalog from Challenge Cutlery, owned by Wiebusch and Hilger, not only documents the company’s line of pocketknives at that time but also shows a few views of the factory, how they pack knives, details on their pattern numbering system and more. In addition to Challenge knives, the catalog includes the company’s line of Fly-lock (Flylock) switchblades which was limited to just the 3-3/8″ double blades and a single large model without guard at this time.