knuckle-duster knife - Mark I trench knife, 1918 [French copy]
Hilt form: similar to WEA 646, US Mark I trench knife, heavy cast brass grip with four-finger knuckle-duster guard. WEA/648 differs in the following respects - the underside of grip is not as well shaped to hand and the back is fluted at either edge; the tang nut at pommel end is four-sided rather than hexagonal and utilises a washer; the outer edge of the knuckle-duster guard does not have as well formed spiked projections; overall the weapon lacks the same high standard of finish.
Grip finish: polished brass (not dull black paint).
Blade form: slightly shorter, and bright finished, version of that for WEA 646.
(Related item: scabbard)
Reference: Stephens, Frederick J, 1985, Fighting Knives, Arms and Armour, London, p 56 (ref 277).
 inscription indented, grip (right side)
 mark (lion couchant), stamped, blade (right ricasso)