 In the early 1980s, Applegate released a design called the Applegate-Fairbairn fighting knife (a modified version of the World War II Fairbairn-Sykes knife).The new knife's design was a collaborative effort by Applegate and Fairbairn during World War II, eliminating the major weaknesses of the F-S knife (among them a weak blade point and the impossibility of determining the blade's orientation by grip alone).Boker Knives offers several versions of the A-F knife.