Genuine Hirschhf�nger but the DJ badge looks to have been added, probably to try and help sell it for more money. Knot is for the shooting association and not for the forestry.
There are some aditional aspects to this piece that I don't like--Etch is too close to the blade tip-repoint?--Frog is Czech not German and not regulation for the piece. Scabbard tip is not typical for this plain type longer piece.
In the center of the grip there is a DJ insignia where an acorn with leaves should be. Can't tell from the picture if it's original, but in any case it doesn't belong on this piece. Thanks.