How William Fairbairn Created the Modern SWAT Team in Warlord Era Shanghai

Another variation has a gray smooth handle and a crossguard that is more rectangular than the more common oval crossguard. Anecdotally, this dagger has been attributed to Free Polish airborne troops who ordered the daggers while in the UK. However, the standard book on Polish military knives, Noze Wojska Polskiego, does not include this knife, showing only standard 2nd and 3rd Pattern knives as having been used by Free Polish forces (Leroy Thompson, "Fairbairn-Sykes commando dagger").