1) All iron construction. 9-1/4 inch blade. The serial number is marked on the hilt. No other markings on bayonet or scabbard. Note the second mounting ring at the rear of the hilt with no provision for fitting over a sight. All joints are welded except the frog button on the scabbard which is brazed. 2) #4828 on open top cross guard. Twelve inch single filler blade with proofmarks on the spine. Factory made iron hilt. "Fag" in oval logo on reverse of scabbard which shows brazing around the frog button. 3) Number has been ground on cross guard. 9-1/2 inch single fuller blade #4129 on iron hilt. Unmarked scabbard and frog. 4) 9-3/4 inch single fuller blade. #8141 on cross guard. The factory made metal hilt and the scabbard have been painted green. The frog has "RBN 0/1001/0045" stamped on the back of the belt loop. 5) 11-7/8 inch single fuller blade has a broken tip. No marks at all. The frog button is brazed.