"...Wilkinson-Latham contacted Charles Rose, head of the experimental workshop at Wilkinson Sword Company's factory in Southfield Road, Acton, London W3. He charged Rose, and the firm's foreman grinder, Mr. Martin, with the task of producing three prototype Fairbairn-Sykes knives.
Of these three prototypes, one is known to survive. Fairbairn kept it with him until the day of his death. From 1942 to 1960, he carried it in an OSS All-Ways scabbard. This scabbard, known among OSS trainees as the "pancake flapper," was designed by Fairbairn for the OSS and manufactured in the United States.
Wishing to spare the collector the nuisance of counterfeits, we will omit giving a detailed description of this prototype, save to say that it has distinctive features in common with the other two prototypes.
Of the two remaining specimens, one was presented to Sykes and is presumed lost. The other was retained by the factory. It was, in time, given to Wilkinson-Latham's grandson, Robert, when the latter was eleven years old. A year later, Robert traded it to a school chum for a bayonet. We may set our fancy to work, and imagine this unique specimen resting in the collection of some fortunate, although unknowing, knife collector."