All About Pocket Knives

I found an old knife with "Praktikum D.R.M." engraved on one side with a floral motif. There is a corkscrew on one side and two knives on the other. The larger of the knives appears to be rusted shut. I can't seem to find anything about this brand online. Can anyone share some information about the brand?

It looks German made. The D.R.M. is a design patent.

It looks like you can slide the corkscrew handle off from the rest of the knife if you push up on that side of the handle

I think the knife comes apart in two pieces.