The third pattern was made between early 1943 and 1945. It had an even more simple design, not only to save brass as this was an strategic metal but most of all to speed up production. It was available to every allied soldier stationed in Britain and it prooved to be a popular item, bringing hard cash into the economy.
The blade is either drop forged, or mechanically ground from 3/16" steel that no longer shows the triangular grinding mark. Blades were either brightly polished or blued. Rarely they are found with the "F/S fighting knife" and "Wilkinson" logos.
The crossguard is identical to that of the the second pattern F/S knife; it has a blued finish. Sometimes it is marked with an "I", these are Indian made knives.
The pommel nut is now either the "small acorn", "large acorn" or "dome". Like the second pattern they are made from either steel or brass and have a blued finish.
The hilt was made from zinc, copper plated and blackened. There was a moldnumber between one and four just under the pommel nut; sometimes even a hilt number is found right above the crossguard.
The scabbard remained the same as the second pattern.

The examples of the 3rd pattern that were made postwar often have more than one of the following properties:

Blade: No triangular grinding mark.
Crossguard: 1/8" steel, often showing Sheffield and makers such as Cooper or Nowill & Sons.
Pommel nut: Often flat disk, slutted disk or hexagonal .
Hilt: No mould number, no copper plating, castlines are visible on both sides.
Scabbard: Poorer quality leather, course stitching, wider (1/2") elasticated band, frog rivited to the outside of the scabbard.