Arthur Sykes 820 Flat sheath Fairbairn Sykes Commando Knife M.O.D. Specification Black Carbon Steel Blade Metal handle Belt Sheath.This is the veryknife that made the British Commandos infamous during WWII. Double edged blade, heavy cast, handle finished in black matt. A must for any serious collector. Complete with choice of leather sheath. This model uses the flat sheath. 175mm blade – 295mm overall.