All About Pocket Knives

So I am pretty sure this is a German manufactured knife, probably pre-wwii?
and possibly a F. HERDER A SN-SOLINGEN manufacturer?
It just has the markings D.R.G.M. and crossed keys on it. Blade has a mirror finish and minimal evidence of any use or sharpening that I can see.
Nothing else. Can anyone confirm its maker and perhaps its' date or era of manufacturing?
Much abliged!

You are correct that it is a F. Herder knife. I am not sure if the handle and guard are original to it. Made when I don't know. Is the sheath marked in any way? It looks like it would fit the knife well. Maybe someone else has seen a similar Herder knife.

I believe it is a Herder blade that has been well cleaned and buffed and a handle and guard added by somebody other than the factory.

at99sy wrote: ↑Tue Feb 08, 2022 9:53 pm So.....

This is all I could find on your crossed keys stamp.
The crossed keys on your knife are the same
crossed keys in the second or bottom picture.

btrwtr wrote: ↑Tue Feb 08, 2022 10:40 pm You are correct that it is a F. Herder knife. I am not sure if the handle and guard are original to it. Made when I don't know. Is the sheath marked in any way? It looks like it would fit the knife well. Maybe someone else has seen a similar Herder knife.

There are no markings on the sheath, I would say it is probably not a period sheath. it looks too new.

New_Windsor_NY wrote: ↑Tue Feb 08, 2022 10:52 pm

at99sy wrote: ↑Tue Feb 08, 2022 9:53 pm So.....

This is all I could find on your crossed keys stamp.
The crossed keys on your knife are the same
crossed keys in the second or bottom picture.

Yep the bottom one looks like a match to the keys. Do you think the absence of any words indicates a date range?

at99sy wrote: ↑Tue Feb 08, 2022 11:22 pm Yep.....

I honestly don't know.