Case XX Knife Pattern
The Melon Tester(00) is a long slim regular Jack Knife that was produced with either one or two blades. This pattern features a Long Spear master blade and a Small Spear secondary blade, opening on the same end. Throughout its years of production, the Melon Tester was only produced with white composite handles and stainless steel blades. Other names for this pattern are Citrus Tester and Sausage Tester.