Hi Albin..I will move this to the K98 Bayonet forum..for further review.
A wealth of Information can be found here within the Bayo forum as S/155 is the identity of EF Horster.
K98 Registry data and German Ordnance codes & Rbnr
The bayo Gents can assist you further on your Bayonet. Enjoy your stay Welcome to the forum. Regards Larry
It is not the size of a Collection in History that matters......Its the size of your Passion for it!! - Larry C
One never knows what tree roots push to the surface of what laid buried before the tree was planted - Larry C
“The farther back you can look, the farther forward you are likely to see.” - Winston Churchill
0.3042 K is a Naval [Kriegsmarine] marking.
Should be coated in oil to stop the rust, the blade looks ok, as mentioned KM marked S84/98 bayonet made by E.u.F.Hoerster Solingen in 1937.b.r.Andy
PS what is the serial number and letter under? thanks.