13.5" tapered, flat, unfullered blade, 1.25" wide at ricasso. Overall length 16.875". Pronounced median ridge along spine with nominally 10" flutes on either side. 3.25" socket with three step "Z" shaped mortise cut for a top stud and a nominally 1.5" muzzle to stud distance. Interior muzzle diameter nominally .92" with rear of socket nominally .97". Applied rolled reinforced collar at rear of socket damaged and partially missing. 1.25" neck with roughly oval cross section and flat face is applied with a "shield" or "flanged" shank. A lap seam runs the length of the socket's interior on the reverse side. Reilly shows similar examples as B14 and B16 in American Socket Bayonets and Neumann shows similar examples as 58.BB and 59.BB in Battle Weapons of the American Revolution.