Bayonet is made in 1963, and in at least 3 series (marked L, S or O on the guard). This is marked S.
It looks like the m/1965 but with a thinner grip with 12 "ribs".
The scabbard is the same as for trial fighting knife fm/1964 or the early m/1965 without the lock.
It is pictured in early AK4 manuals.