These were privately purchased "dress" or walking-out" variants of the KS98 Mauser Bayonet, without the sawback and is a shorter version of the German Model 1939 "Long" Dress Bayonet.
All metal parts are nickel-plated, grips are black plastic.
The hilts are steel construction, single rearward-swept lower quillon, bird's-head pommel.
The blades are usually about 8" in length, but some variants can be found with blades of ~10".
They can be found in a number of variations, some with screw-on grips, others with 2 or 3 grip-retaining rivets; some were never intended to be placed on a rifle as the slots are removed or deleted entirely.
This example was produced by Paul D. Luneschloss (PDL) whom was in business - in some capacity - from 1810 to about 1965.

Scabbards are black-enameled, sheet-rolled steel.