This is a 3rd pattern Fairbairn-Sykes fighting knife manufactured in 1976 in Sheffield England. One side of the blade guard is marked "NATO No 4658827 1976". The other side of the blade guard is marked "SHEFFIELD ENGLAND".
This knife and its scabbard are both in like-new condition. The handle shows some slight rubbing from rubbing against the scabbard.
Please review the pictures and submit any questions before purchasing.