WW2 British Commando Fairbairn Sykes Rare Third pattern ⩚B2 Marked

For a long time the ⩚B2 stamped examples origin was unknown and open to a great deal of speculation.  That is until some documented evidence was unearthed by Robert Wilkinson-Latham which conclusively established a link with Wilkinsons with the ⩚B2 ownership/inspection mark.  This mark is most often encountered on Second Pattern F-S knives and indeed in this respect is the most common marking found on any war-time F-S.  However this mark does appear on Third Pattern knives, all be it rarely which makes it worth looking out for.