commando knife German bayonet

Description

I am listing 2 knives that I have had for 3-4 decades. I have photographed them in the present condition as I was told not to clean them as I would destroy their value!
I have been told that the US commando knife is quite valuable. It says USM3 Case on the blade guard as you can see in the pic.
The German bayonet I think is from ww1 but am not sure,I was not able to match it exactly in any pic's of German bayonets.
The Marine knife has a blade 6.5" long with an overall length of 11-3/8"
The bayonet is 21-1/8" long and the blade is 15-5/8"